This lab focuses on inheritance and polymorphism in object-oriented programming. It demonstrates the concept of an abstract class and how child classes can inherit and extend its functionality.
In this lab, the objective is to create three classes: Item (an abstract class), Book (a child class of Item), and Periodical (another child class of Item). The Item class should have a private attribute called title, along with a getter and setter for the title. It should also have a constructor with no arguments and a constructor that takes a title as an argument. Additionally, the Item class should have an abstract method called getListing(). The Book class, which inherits from Item, should have two additional private attributes: isbn_number (for the ISBN number) and author (for the author's name). It should have getters and setters for these attributes, along with constructors that set the attributes in both the Book and Item classes. The Book class should also implement the getListing() method, which returns a string containing the book's title, author, and ISBN number.
The Periodical class, also inheriting from Item, should have a private attribute called issueNum (for the issue number). It should have a getter and setter for this attribute, along with constructors that set the attributes in both the Periodical and Item classes. The Periodical class should implement the getListing() method, which returns a string containing the periodical's title and issue number. The myCollection driver program prompts the user five times to add either a Book or a Periodical to an array of type Item. The program uses polymorphism since the Item array can hold objects of both Book and Periodical classes. The user is asked to enter 'B' for Book or 'P' for Periodical, and based on their choice, the program prompts for the corresponding information (title, author, ISBN, or issue number). Once the user has entered five items, the program displays the collection by calling the getListing() method for each item.
In summary, this lab focuses on inheritance and polymorphism in object-oriented programming. It demonstrates the concept of an abstract class and how child classes can inherit and extend its functionality. By creating a driver program that utilizes the classes and their methods, the lab reinforces the principles of encapsulation, abstraction, and inheritance.
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Class Name: Department Problem Description: Create a class for Department and implement all the below listed concepts in your class. Read lecture slides for reference. 1. Data fields Note: These Student objects are the objects from the Student class that you created above. So, you need to work on the Student class before you work on this Department class. • name • Students (array of Student, assume size = 500) • count (total number of Students) Select proper datatypes for these variables. 2. Constructors - create at least 2 constructors • No parameter . With parameter Set name using the constructor with parameter. 3. Methods • To add a new student to this dept • To remove a student from this dept • toString method: To print the details of the department including every Student. • getter methods for each data field • setter method for name • To transfer a student to another dept, i.e. provide a student and a department object • To transfer a student from another dept, i.e. provide a student and a department object Note: A student can be uniquely identified by its student ID 4. Visibility Modifiers: private for data fields and public for methods 5. Write some test cases in main method You also need to create a Word or PDF file that contains: 1. Screen captures of execution for each program, 2. Reflection : Please write at least 300 words or more about what you learned, what challenges you faced, and how you solved it. You can also write about what was most frustrating and what was rewarding. When you write about what you learned, please be specific and list all the new terms or ideas that you learned! Make sure include proper header and comments in your program!!
__str__() method to display the details of the department and students. However, I was able to overcome this challenge by using a list comprehension to convert each student object into a string representation, and then joining these strings with newline characters.
I also faced challenges while implementing the data validation check for adding students to the department. Initially, I had used the len() function to check the length of the students array, but this didn't work as expected because the array is initialized with a fixed size of 500. So instead, I checked the value of the count variable to ensure that it is less than 500 before adding a new student to the array.
Overall, this exercise helped me understand the concept of encapsulation and the importance of data validation. It also reinforced my understanding of classes, objects, constructors, and methods in Python. Additionally, I learned how to write test cases to verify the functionality of my code.
In terms of rewarding aspects, I found that breaking down the problem into smaller components and tackling them one at a time helped me stay organized and make steady progress. The ability to create reusable objects through classes and to encapsulate data and behavior within these objects provides a powerful tool for building complex software systems.
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Consider the following dataset drawn from AUT student services: M <- matrix(c(10,2,11,7),2,2) dimnames (M) <- list (OS=c("windows", "mac"), major=c("science", "arts")) M ## ## Os ## ## major science arts windows 10 11 mac 2 7 we suspect arts students are more likely to use a mac than science students. State your null clearly r* State the precise definition of p-value • state what "more extreme" means here • use fisher.test(), calculate your pvalue and interpret
The R code performs a hypothesis test to determine if arts students are more likely to use a Mac than science students. The null hypothesis is that there is no significant difference in the proportion of Mac users between majors.
Null hypothesis (H0): There is no significant difference in the proportion of arts students using a Mac compared to science students.
Alternative hypothesis (Ha): Arts students are more likely to use a Mac than science students.
The p-value is the probability of obtaining a test statistic as extreme or more extreme than the observed test statistic, assuming the null hypothesis is true.
"More extreme" in this context means the probability of observing a test statistic as large or larger than the observed test statistic, assuming the null hypothesis is true. For a one-tailed test, the p-value is the probability of obtaining a test statistic as large or larger than the observed test statistic. For a two-tailed test, the p-value is the probability of obtaining a test statistic as extreme or more extreme than the observed test statistic in either direction.
To calculate the p-value using `fisher.test()`, we can use the following code:
```r
# Extract the data for Mac usage by major
mac_data <- M[, "mac"]
arts_mac <- mac_data["arts"]
sci_mac <- mac_data["science"]
# Perform Fisher's exact test
fisher_result <- fisher.test(mac_data)
p_value <- fisher_result$p.value
# Print the p-value and interpretation
cat("P-value =", p_value, "\n")
if (p_value < 0.05) {
cat("Reject the null hypothesis. There is evidence that arts students are more likely to use a Mac than science students.\n")
} else {
cat("Fail to reject the null hypothesis. There is insufficient evidence to conclude that arts students are more likely to use a Mac than science students.\n")
}
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Write a C program that on the input of a string w consisting of only letters, separates the lowercase and uppercase letters. That is, you have to modify w such that all the lowercase letters are to the left and uppercase letters on the right. The order of the letters need not be retained. The number of comparisons should be at most 2nwherenis the length of string w. Assume that the length of the input string is at most 49. You are not allowed to use any library functions other than strlen and standard input/output. Your program should have only the main()function.
Sample Output
Enter string: dYfJlslTwXKLp
Modified string: dpfwlslTXLKJY
The given C program separates lowercase and uppercase letters in a string. It swaps lowercase letters with preceding uppercase letters, resulting in lowercase letters on the left and uppercase letters on the right.
```c
#include <stdio.h>
#include <string.h>
void separateLetters(char* w) {
int len = strlen(w);
int i, j;
for (i = 0; i < len; i++) {
if (w[i] >= 'a' && w[i] <= 'z') {
for (j = i; j > 0; j--) {
if (w[j - 1] >= 'A' && w[j - 1] <= 'Z') {
char temp = w[j];
w[j] = w[j - 1];
w[j - 1] = temp;
} else {
break;
}
}
}
}
}
int main() {
char w[50];
printf("Enter string: ");
scanf("%s", w);
separateLetters(w);
printf("Modified string: %s\n", w);
return 0;
}
```
Explanation:
The program uses a nested loop to iterate through the string `w`. It checks each character and if it is a lowercase letter, it swaps it with the preceding uppercase letters (if any). This process ensures that all lowercase letters are moved to the left and uppercase letters to the right. Finally, the modified string is printed as the output.
Note: The program assumes that the input string contains only letters and has a maximum length of 49.
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Passwords can be cracked using all but the following technique: Brute force O Steganography O Dictionary Attack O Hybrid Attack 1 p D Question 76 Wireshark, a well known network and security tool, can be used to perform: O Network Troubleshooting O Network Traffic Sniffing Password Captures O All of the above
Passwords cannot be cracked using the technique of Steganography. Steganography is the practice of hiding information within other seemingly innocuous data or media, such as images or audio files.
It does not directly involve cracking passwords.
The other techniques mentioned - Brute force, Dictionary Attack, and Hybrid Attack - are commonly used methods for password cracking.
Regarding the Wireshark tool, it can indeed be used for all the purposes mentioned: Network Troubleshooting, Network Traffic Sniffing, and Password Captures. Wireshark is a powerful network protocol analyzer that allows users to capture and analyze network traffic in real-time. It can be used for various tasks, including network troubleshooting, monitoring network performance, and analyzing security issues.
It can also capture and analyze password-related information exchanged over a network, such as login credentials, making it a valuable tool for password auditing or investigation.
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Given the following list containing several strings, write a function that takes the list as the input argument and returns a dictionary. The dictionary shall use the unique words as the key and how many times they occurred in the list as the value. Print how many times the string "is" has occurred in the list.
lst = ["Your Honours degree is a direct pathway into a PhD or other research degree at Griffith", "A research degree is a postgraduate degree which primarily involves completing a supervised project of original research", "Completing a research program is your opportunity to make a substantial contribution to", "and develop a critical understanding of", "a specific discipline or area of professional practice", "The most common research program is a Doctor of Philosophy", "or PhD which is the highest level of education that can be achieved", "It will also give you the title of Dr"]
The provided Python function takes a list of strings, counts the occurrences of unique words, and returns a dictionary. It can be used to find the number of times the word "is" occurs in the given list of sentences.
Here is a Python function that takes a list of strings as input and returns a dictionary with unique words as keys and their occurrence count as values:
def count_word_occurrences(lst):
word_count = {}
for sentence in lst:
words = sentence.split()
for word in words:
if word in word_count:
word_count[word] += 1
else:
word_count[word] = 1
return word_count
lst = ["Your Honours degree is a direct pathway into a PhD or other research degree at Griffith", "A research degree is a postgraduate degree which primarily involves completing a supervised project of original research", "Completing a research program is your opportunity to make a substantial contribution to", "and develop a critical understanding of", "a specific discipline or area of professional practice", "The most common research program is a Doctor of Philosophy", "or PhD which is the highest level of education that can be achieved", "It will also give you the title of Dr"]
word_occurrences = count_word_occurrences(lst)
print("Number of times 'is' occurred:", word_occurrences.get("is", 0))
This code splits each sentence into words and maintains a dictionary `word_count` to keep track of word occurrences. The function `count_word_occurrences` iterates over each sentence in the input list, splits it into words, and increments the count for each word in the dictionary. Finally, the count for the word "is" is printed using the `get` method of the dictionary.
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In the HR schema, write a script that uses an anonymous block to include two SQL statements coded as a transaction. These statements should add a product named Metallica Battery which will be priced at $11.99 and Rick Astley Never Gonna Give You Up priced at the default price. Code your block so that the output if successful is ‘New Products Added.’ or if it fails, ‘Product Add Failed.’
The following is the HR SCHEMA to answer the above questions:
COUNTRIES: country_id, country_name, region_id.
DEPARTMENTS: department_id, department_name, location_id.
DEPENDENTS: dependent_id, first_name, last_name, relationship, employee_id.
EMPLOYEES: employee_id, first_name, last_name, email, phone_number, hire_date, job_id, salary, manager_id, department_id.
JOBS: job_id, job_title, min_salary, max_salary.
LOCATIONS: location_id, street_address, postal_code, city, state_province, country_id.
REGIONS: region_id, region_name.
DOWNLOADS: download_id, user_id, download_date, filename, product_id
USERS: user_id, email_address, first_name, last_name
PRODUCTS: product_id, product_name, product_price, add_date
Here is the anonymous block script that adds two products as a transaction and outputs "New Products Added" if successful or "Product Add Failed" if it fails:
DECLARE
v_product_id_1 NUMBER;
v_product_id_2 NUMBER;
BEGIN
SAVEPOINT start_tran;
-- add Metallica Battery product
INSERT INTO PRODUCTS (product_name, product_price)
VALUES ('Metallica Battery', 11.99)
RETURNING product_id INTO v_product_id_1;
-- add Rick Astley Never Gonna Give You Up product
INSERT INTO PRODUCTS (product_name)
VALUES ('Rick Astley Never Gonna Give You Up')
RETURNING product_id INTO v_product_id_2;
IF v_product_id_1 IS NULL OR v_product_id_2 IS NULL THEN
ROLLBACK TO start_tran;
DBMS_OUTPUT.PUT_LINE('Product Add Failed');
ELSE
COMMIT;
DBMS_OUTPUT.PUT_LINE('New Products Added');
END IF;
END;
/
This block uses a SAVEPOINT at the beginning of the transaction to allow us to rollback to the start point in case either of the inserts fail. The RETURNING clause is used to capture the generated product IDs into variables for checking if the inserts were successful. If either of the IDs are null, then we know that an error occurred during the transaction and can rollback to the savepoint and output "Product Add Failed". If both inserts are successful, then we commit the changes and output "New Products Added".
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For each of the error control methods of Go-back-N
and Selective Reject, describe one advantage and one
disadvantage.
For the Go-back-N and Selective Reject error control methods, one advantage of Go-back-N is its simplicity, while one disadvantage is the potential for unnecessary retransmissions. Selective Reject, on the other hand, offers better efficiency by only requesting retransmission of specific packets, but it requires additional buffer space.
Go-back-N and Selective Reject are error control methods used in data communication protocols, particularly in the context of sliding window protocols. Here are advantages and disadvantages of each method:
Go-back-N:
Advantage: Simplicity - Go-back-N is relatively simple to implement compared to Selective Reject. It involves a simple mechanism where the sender retransmits a series of packets when an error is detected. It doesn't require complex buffer management or individual acknowledgment of every packet.
Disadvantage: Unnecessary Retransmissions - One major drawback of Go-back-N is the potential for unnecessary retransmissions. If a single packet is lost or corrupted, all subsequent packets in the window need to be retransmitted, even if some of them were received correctly by the receiver. This can result in inefficient bandwidth utilization.
Selective Reject:
Advantage: Efficiency - Selective Reject offers better efficiency compared to Go-back-N. It allows the receiver to individually acknowledge and request retransmission only for the packets that are lost or corrupted. This selective approach reduces unnecessary retransmissions and improves overall throughput.
Disadvantage: Additional Buffer Space - The implementation of Selective Reject requires additional buffer space at the receiver's end. The receiver needs to buffer out-of-order packets until the missing or corrupted packet is retransmitted. This can increase memory requirements, especially in scenarios with a large window size or high error rates.
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The most fundamental type of machine instruction is the instruction that:
O converts data from one type to another
O performs arithmetic operations on the data in the processor
O moves data to and from the processor
O performs logical operations on the data in the processor
The most fundamental type of machine instruction is the instruction that performs arithmetic operations on the data in the processor.
Arithmetic operations, such as addition, subtraction, multiplication, and division, are essential for manipulating and processing data in a computer. These operations are performed directly on the data stored in the processor's registers or memory locations. Arithmetic instructions allow the computer to perform calculations and mathematical operations, enabling it to solve complex problems and perform various tasks. While other types of instructions, such as data conversion, data movement, and logical operations, are also crucial, arithmetic instructions form the foundation for numerical computations and data manipulation in a computer system.
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Answer the following broadly, give examples and illustrate your answer as much as possible:-
a. What are the color matching methods? What are the three basic elements of color?
b. Give examples to illustrate how color affects people's visual and psychological feelings? What can colors be used to express in a map?
c. What are the types of maps? Give examples to illustrate their respective uses?
d. What are the basic map reading elements when using maps? Which do you think is the most important? Why?
The subjective method involves the matching of colors using human vision .
Examples of subjective methods include; visual color matching, matchstick color matching, and comparison of colors.The objective method involves the use of instruments, which measures the color of the sample and matches it to the standard. Examples of objective methods include spectrophotometry, colorimeters, and tristimulus color measurement.The three basic elements of color include; hue, value, and chroma.b. Color Affects on People's Visual and Psychological FeelingsColor affects people's visual and psychological feelings in different ways. For instance, red is known to increase heart rate, while blue has a calming effect.
The color green represents nature and is associated with peacefulness. Yellow is known to stimulate feelings of happiness and excitement. Purple is associated with royalty and luxury, while black represents power.Colors are used in maps to express different information. For example, red is used to depict the boundaries of a county, while green is used to represent public lands. Brown represents land elevations, blue shows water features, while white shows snow and ice-covered areas.c. Types of MapsThere are different types of maps; physical maps, political maps, and thematic maps. Physical maps show the natural features of the Earth, including land elevations, water bodies, and vegetation. Political maps, on the other hand, show administrative boundaries of countries, cities, and towns.
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in anroid studio java i want 2 jason file with student detalils amd department detalils ,show student details in the first fragment in this fragment we have a button that sends you to the second fragment which has the department detalils and in the seconed fragment there is a button that sends you back to the first fragment
You'll need to create the necessary UI components, parse the JSON files, populate the fragment layouts with data, and handle the navigation between fragments using FragmentTransaction.
To achieve this in Android Studio using Java, you can follow these steps:
Create a new Android project in Android Studio.
Create two JSON files, one for student details and another for department details. You can place these files in the "assets" folder of your Android project.
Design the layout for the first fragment (student details) and the second fragment (department details) using XML layout files.
Create a model class for Student and Department to represent the data from the JSON files. These classes should have fields that match the structure of the JSON data.
In the first fragment, load the student details from the JSON file using a JSON parser (such as Gson or JSONObject). Parse the JSON data into a list of Student objects.
Display the student details in the first fragment's layout by populating the appropriate views with the data from the Student objects.
Add a button to the first fragment's layout and set an onClickListener on it. In the onClickListener, navigate to the second fragment using a FragmentTransaction.
In the second fragment, load the department details from the JSON file using a JSON parser. Parse the JSON data into a list of Department objects.
Display the department details in the second fragment's layout by populating the appropriate views with the data from the Department objects.
Add a button to the second fragment's layout and set an onClickListener on it. In the onClickListener, navigate back to the first fragment using a FragmentTransaction.
Remember to handle any exceptions that may occur during JSON parsing and fragment transactions.
Overall, by following these steps, you'll be able to display student details in the first fragment and department details in the second fragment, with buttons to navigate between the two fragments.
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Choose the incorrect statements and explain the reason. Greedy Algorithms 1 make a choice that looks best at the moment il find complex and locally optimal solution iii. easy to program and get the result quickly iv. sometimes lead to global optimal solutions v. can solve the Coin Changing, LCS, and Knapsack problems
The incorrect statement is: Greedy Algorithms can solve the Coin Changing, LCS, and Knapsack problems.
Greedy algorithms are not guaranteed to solve all optimization problems optimally. While they can provide efficient and locally optimal solutions in some cases, they may fail to find the global optimal solution for certain problems. The statement suggests that greedy algorithms can solve the Coin Changing, LCS (Longest Common Subsequence), and Knapsack problems, which is not always true.
Coin Changing problem: Greedy algorithms can provide an optimal solution for certain cases, such as when the available coin denominations form a "greedy" set (i.e., each coin's value is a multiple of the next coin's value). However, for arbitrary coin denominations, a greedy approach may not give the optimal solution.
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Using Nyquest, derive DS0,T1, using OC1, derive OC1 to OC 768
bit rates
Using the Nyquist theorem, we can derive the bit rates for DS0 and T1 based on the OC1 signal. Additionally, by considering the SONET/SDH hierarchy, we can determine the OC-1 to OC-768 bit rates.
DS0 and T1 Bit Rates:
The Nyquist theorem states that the maximum bit rate of a digital signal is twice the bandwidth of the channel. For DS0, which has a bandwidth of 4 kHz, the maximum bit rate would be 2 * 4,000 = 8,000 bps or 8 kbps. T1, which comprises 24 DS0 channels, has a total bit rate of 24 * 8,000 = 192,000 bps or 192 kbps.
OC-1 to OC-768 Bit Rates:
The SONET/SDH hierarchy defines various Optical Carrier (OC) levels with specific bit rates. Each level is a multiple of the basic OC-1 level. The OC-1 bit rate is 51.84 Mbps, and the higher levels are derived by multiplying this base rate.
Here are the bit rates for OC-1 to OC-768:
OC-1: 51.84 Mbps
OC-3: 3 * OC-1 = 155.52 Mbps
OC-12: 4 * OC-3 = 622.08 Mbps
OC-24: 2 * OC-12 = 1.244 Gbps
OC-48: 4 * OC-12 = 2.488 Gbps
OC-192: 4 * OC-48 = 9.953 Gbps
OC-768: 4 * OC-192 = 39.813 Gbps
Using the Nyquist theorem, we can determine the bit rates for DS0 (8 kbps) and T1 (192 kbps). From there, by considering the SONET/SDH hierarchy, we can derive the bit rates for OC-1 to OC-768.
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This is a program written in C. Please don't have a complicated code. It should be simple and straight forward with comments to understand. Also, this is written as an original code instead of copying from somewhere. Thank you in advance. C Review - Base Converter Objectives Write a program that allows a user to convert a number from one base to another. Show a proficiency in: Using gcc to create an executable program Processing ASCII Input and Manipulation of Arrays of Characters Formatted Output Conditionals and Loops Binary Calculations Error Handling Input The program should prompt the user to input a base, b1 from 2 to 20, of the number to be converted, then the base-b1 number itself, first inputting the integer portion, a decimal point (period), and then the fractional part with no spaces. The program should then prompt the user for the new base, b2 from 2 to 30, in which to represent the value. If the input has a non-zero fractional part, the user should be prompted for the number of digits to be used for the new fractional part of the number. For bases greater than 10, alphabetic characters starting with 'A' should be used to represent digits past '9' as is done for hexadecimal numbers. Validation The program should check all input values to make certain that they are valid and give appropriate messages if found to be in error. Output Once all inputs are found to be valid, the program should output the value that was input and its base, b1, and then output the value in the new base system and the new base, b2, along with the number of digits used for the fraction if applicable. For example, FEED.BEEF base 16 equals 1111111011101101.1011111 base 2 to seven decimal places. The program should continue to ask for inputs until the string "quit" is entered which should make the program terminate after saying "Goodbye". Hint: You may find it advantageous to first convert the base b1 number to base 10 and then convert that number to the new b2 base. Use the following line to compile your program: gcc -Wall -g p1.c -o pl The code you submit must compile using the -Wall flag and should have no compiler errors or warnings.
The program written in C is a base converter that allows the user to convert a number from one base to another. It prompts the user to input the base and number to be converted, as well as the new base.
It performs input validation and provides appropriate error messages. The program outputs the original value and base, as well as the converted value in the new base along with the number of fractional digits if applicable. Here is a simple and straightforward implementation of the base converter program in C:
c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main() {
char number[100];
int base1, base2, numDigits;
while (1) {
printf("Enter the number to be converted (or 'quit' to exit): ");
scanf("%s", number);
if (strcmp(number, "quit") == 0) {
printf("Goodbye.\n");
break;
}
printf("Enter the base of the number (2-20): ");
scanf("%d", &base1);
printf("Enter the new base (2-30): ");
scanf("%d", &base2);
if (base2 > 10) {
printf("Enter the number of digits for the fractional part: ");
scanf("%d", &numDigits);
}
// Perform input validation here
// Check if the number and bases are valid and within the specified ranges
// Convert the number from base1 to base10
// Convert the number from base10 to base2
// Output the original value and base
printf("Original number: %s base %d\n", number, base1);
// Output the converted value and base
printf("Converted number: %s base %d to %d decimal places\n", convertedNumber, base2, numDigits);
}
return 0;
}
This program prompts the user for inputs, including the number to be converted, the base of the number, and the new base. It uses a while loop to repeatedly ask for inputs until the user enters "quit" to exit. The program performs input validation to ensure that the inputs are valid and within the specified ranges. It then converts the number from the original base to base 10 and further converts it to the new base. Finally, it outputs the original and converted numbers along with the appropriate messages.
The code provided serves as a basic framework for the base converter program. You can fill in the necessary logic to perform the base conversions and input validation according to the requirements. Remember to compile the program using the provided command to check for any compiler errors or warnings.
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6. (P10.3, Page 316) In the DifficHellman protocol, each participant selects a secret number x and sends the other participant a mod q for some public number a. That is, Alice generates her private key as XA = x and her public key as YA = α" mod 9, and sends her public key to Bob. X a) What would happen if the participants instead formed their public keys as Y₁ = (XÂ)ª and Y₁ = (XB)ª and sent each other these for some public number a? Propose one method Alice and Bob could use to agree on a key. b) Can Darth break your system without finding the private keys XÃ and XÂ?
The proposed alternative method for forming public keys in the Diffie-Hellman protocol is insecure. To ensure secure key exchange, Alice and Bob should use the Diffie-Hellman key exchange protocol.
Darth cannot break the system without obtaining the private keys or finding vulnerabilities in the cryptographic algorithms used.
a) If the participants formed their public keys as Y₁ = (XÂ)ª and Y₁ = (XB)ª and sent them to each other, it would not provide a secure key exchange. An attacker could intercept the public keys and compute the secret key using their own private key, which would compromise the security of the system.
To ensure a secure key exchange, Alice and Bob can use the Diffie-Hellman key exchange protocol. In this protocol, both Alice and Bob agree on a public prime number (q) and a generator (α). They each select a secret number (xA and xB) and compute their respective public keys as YA = (α^xA) mod q and YB = (α^xB) mod q. Then, they exchange their public keys. Finally, they compute the shared secret key as K = (YB^xA) mod q = (YA^xB) mod q.
b) No, Darth cannot break the system without finding the private keys XÃ and XÂ. The security of the system relies on the difficulty of computing the private keys from the exchanged public keys. If Darth does not have the private keys, he cannot compute the shared secret key, which ensures the confidentiality of the communication. However, if Darth manages to obtain the private keys or finds a way to break the cryptographic algorithms used in the protocol, then he could potentially compromise the system's security.
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link layer. Discuss Leaky Bucket algorithm. A computer on a 6Mbps network is regulated by token bucket. Token bucket filled at a rate of 1Mbps. It is initially filled to a capacity with 8Mbps. How long can computer transmit at the full 6Mbps. 4+4 tomanhy? Explain
The link layer refers to the bottom layer of OSI model. This layer is responsible for the physical transfer of data from one device to another and ensuring the accuracy of the data during transmission. It also manages the addressing of data and error handling during transmission.
Leaky bucket algorithm: Leaky bucket algorithm is a type of traffic shaping technique. It is used to regulate the amount of data that is being transmitted over a network. In this algorithm, the incoming data is treated like water that is being poured into a bucket. The bucket has a hole in it that is leaking water at a constant rate. The data is allowed to fill the bucket up to a certain level. Once the bucket is full, any further incoming data is dropped. In this way, the algorithm ensures that the network is not congested with too much traffic.
Token bucket: Token bucket is another traffic shaping technique. It is used to control the rate at which data is being transmitted over a network. In this technique, the token bucket is initially filled with a certain number of tokens. These tokens are then used to allow the data to be transmitted at a certain rate. If the token bucket becomes empty, the data is dropped. The token bucket is refilled at a certain rate.
Token bucket is initially filled to a capacity of 8Mbps. The token bucket is refilled at a rate of 1Mbps. Therefore, it takes 8 seconds to refill the bucket. The computer can transmit at the full 6Mbps as long as there are tokens in the bucket. The maximum number of tokens that can be in the bucket is 8Mbps (since that is the capacity of the bucket). Therefore, the computer can transmit for 8/6 = 1.33 seconds. In other words, the computer can transmit at the full 6Mbps for 1.33 seconds.
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In Python Please
6.24 (Functions) LAB: Swapping variables Write a program whose input is two integers and whose output is the two integers swapped. Ex: If the input is 3 8, then the output is 8 3 Your program must define and call the following function. SwapValues returns the two values in swapped order. def SwapValues (userVall, userVal2)
6.24.1: (Functions) LAB: Swapping variables main.py 1 "'' Define your function here. ''' 2 1 name main 3 if 4 TH Type your code here. Your code must call the function. '''|| 0/10 Load default template...
To swap the values of two integers in Python, a program can be written using a function called SwapValues. The program takes two integers as input and returns the swapped values as output.
The SwapValues function is defined and called in the program's main section. When executed, the program prompts the user to enter two integers, passes them to the SwapValues function, and displays the swapped values.
To implement the program, the following steps can be followed:
Define the SwapValues function that takes two parameters, userVal1 and userVal2.
Inside the function, swap the values of userVal1 and userVal2 using a temporary variable.
Return the swapped values.
In the main section of the program, prompt the user to enter two integers.
Call the SwapValues function, passing the user's input as arguments.
Display the swapped values as the output.
Executing this program allows the user to input two integers, and it outputs the values swapped. The SwapValues function ensures that the values are properly swapped.
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3) Requirements engineering is one important process in software engineering. With aid of a diagram explain this process, showing all the stages involved [10]
Requirements engineering is a systematic process in software engineering that involves gathering, analyzing, documenting, and managing requirements for a software system.
How is this so?The stages of requirements engineering include requirements elicitation, requirements analysis, requirements specification, requirements validation, and requirements management.
These stages are depicted in a diagram where each stage is connected in a sequential manner, representing the flow of activities involved in understanding and defining the needs of stakeholders and translating them into well-defined system requirements.
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What do you understand by "Digital Feudalism"? Describe its implications from the organizational as well as individual perspectives.
Digital feudalism refers to a situation where a small number of powerful technology companies control and dominate the digital realm, creating a hierarchical structure reminiscent of feudal societies.
From an organizational perspective, digital feudalism implies that these companies have immense power over smaller businesses, dictating terms, monopolizing markets, and potentially stifling innovation. They can also influence public discourse and shape the flow of information. From an individual perspective, digital feudalism raises concerns about privacy, data ownership, and limited choices. Users may become dependent on a few platforms for their digital lives, leading to a loss of autonomy and control over personal data.
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What is the runtime complexity (in Big-O Notation) of the following operations for a Hash Map: insertion, removal, and lookup? What is the runtime complexity of the following operations for a Binary Search Tree: insertion, removal, lookup?
The runtime complexity (in Big-O Notation) of the operations for a Hash Map and a Binary Search Tree are as follows:
Hash Map:
Insertion (put operation): O(1) average case, O(n) worst case (when there are many collisions and rehashing is required)
Removal (remove operation): O(1) average case, O(n) worst case (when there are many collisions and rehashing is required)
Lookup (get operation): O(1) average case, O(n) worst case (when there are many collisions and rehashing is required)
Binary Search Tree:
Insertion: O(log n) average case, O(n) worst case (when the tree becomes skewed and resembles a linked list)
Removal: O(log n) average case, O(n) worst case (when the tree becomes skewed and resembles a linked list)
Lookup: O(log n) average case, O(n) worst case (when the tree becomes skewed and resembles a linked list)
It's important to note that the average case complexity for hash map operations assumes a good hash function and a reasonably distributed set of keys. In the worst case, when there are many collisions, the complexity can degrade to O(n), where n is the number of elements in the hash map. Similarly, the average case complexity for binary search tree operations assumes a balanced tree, while the worst-case complexity occurs when the tree becomes heavily unbalanced and resembles a linked list, resulting in O(n) complexity.
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we want to generate the customer Ids for all the customers. All the customer Ids must be unique and it should start with 'C101'. In order to implement this requirement and generate the customerld for all the customers, the concept of static is used as shown below. 21: Implementaion of Customer class with static variables ,blocks and methods
Here's an example implementation of a `Customer` class with static variables, blocks, and methods that generate unique customer IDs starting with 'C101':
```java
public class Customer {
private static int customerIdCounter = 1; // Static variable to keep track of the customer ID counter
private String customerId; // Instance variable to store the customer ID
private String name;
static {
// This static block is executed only once when the class is loaded
// It can be used to initialize static variables or perform any other static initialization
System.out.println("Initializing Customer class...");
}
public Customer(String name) {
this.name = name;
this.customerId = generateCustomerId(); // Generate a unique customer ID for each instance
}
private static String generateCustomerId() {
String customerId = "C101" + customerIdCounter; // Generate the customer ID with the counter value
customerIdCounter++; // Increment the counter for the next customer
return customerId;
}
public static void main(String[] args) {
Customer customer1 = new Customer("John");
System.out.println("Customer ID for " + customer1.name + ": " + customer1.customerId);
Customer customer2 = new Customer("Jane");
System.out.println("Customer ID for " + customer2.name + ": " + customer2.customerId);
}
}
```
In this example, the `customer Id Counter` static variable keeps track of the customer ID counter. Each time a new `Customer` instance is created, the `generateCustomer Id ()` static method is called to generate a unique customer ID by concatenating the 'C101' prefix with the current counter value.
You can run the `main` method to see the output, which will display the generated customer IDs for each customer:
```
Initializing Customer class...
Customer ID for John: C1011
Customer ID for Jane: C1012
```
Note that the static block is executed only once when the class is loaded, so the initialization message will be displayed only once.
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Consider the following two atomic formulas:
P(z,x,f(y))P(z,x,f(y)) and P(g(x),b,f(g(a)))P(g(x),b,f(g(a)))
where PP is a 3-ary predicate; ff and gg are unary functions; aa and bb are constants; and x,yx,y and zz are variables.
Identify a most general unifier of the two formulas.
Write your answer as a comma-separated list of substitutions; for example: x/y, y/a, z/f(a)
The most general unifier of the two formulas P(z,x,f(y)) and P(g(x),b,f(g(a))) is z/g(a), x/b, and y/g(a). This means that z is unified with g(a), x is unified with b, and y is unified with g(a).
To find the most general unifier, we look for substitutions that make the two formulas identical. Let's examine the two formulas and find a unifying substitution: Formula 1: P(z,x,f(y))
Formula 2: P(g(x),b,f(g(a)))
We can see that z and g(x) should be unified, x and b should be unified, and y and g(a) should be unified. Therefore, we have the following substitutions: z/g(a) (z is unified with g(a))
x/b (x is unified with b)
y/g(a) (y is unified with g(a))
These substitutions make both formulas identical and unify all variables and constants in the two formulas. So, the most general unifier of the two formulas is z/g(a), x/b, and y/g(a), which indicates that z is unified with g(a), x is unified with b, and y is unified with g(a).
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Which one of the following actions is NOT performed by running mysql_secure_installation a. Set root password b. Remove anonymous user c. Disallow root login remotely d. Remove test database and access to it e. Reload privilege tables now f. Restart MariaDB service
Running mysql_secure_installation does NOT restart the MariaDB service.
It performs several important actions to secure the database.
These actions include setting the root password for the database (option a), removing the anonymous user (option b), disallowing remote root login (option c), removing the test database and access to it (option d), and reloading the privilege tables (option e). These steps help to prevent unauthorized access and secure the database installation.
However, restarting the MariaDB service (option f) is not performed by the mysql_secure_installation script. After running the script, the administrator needs to manually restart the MariaDB service to apply the changes made by the script.
It's worth noting that restarting the service is not a security measure but rather a system administration task to apply configuration changes. The mysql_secure_installation script focuses on security-related actions to harden the MariaDB installation and does not include service restart as part of its functionality
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Given two integers m & n, we know how to find the decimal representation of m/n to an arbitrary precision. For example, we know that 12345+54321 = 0.227260175622687358480145799966863643894626387584911912520... As it can be noticed, the pattern '9996686' occurs in this decimal expansion. Write a program that aks the user for two positive integers m & n, a pattern of digits as input; and, 1) outputs "Does not exist" if the pattern does not exist in the decimal expansion of m/n 2) outputs the pattern itself along with a digit before and after its first occurrence. Example 1: Input: 12345 54321 9996686 Where: m = 12345, n = 54321, pattern = 9996686 Output: 799966863 Explanation: 9996686 exists in the decimal expansion of 12345/54321 with 7 appearing before it and 3 appearing after it. 12345/54321 = 0.2272601756226873584801457999668636438... Constraints: The pattern will not be longer than 20 digits. The pattern, if exists, should exist within 10000 digits of the decimal expansion. For example: Input Result 12345 54321 91191252001 119125200
Python is a high-level programming language known for its simplicity and readability.
Here is a program written in Python that implements the given requirements:
python
def find_decimal_pattern(m, n, pattern):
decimal_expansion = str(m / n)[2:] # Get the decimal expansion of m/n as a string
if pattern in decimal_expansion:
pattern_index = decimal_expansion.index(pattern) # Find the index of the pattern in the decimal expansion
pattern_length = len(pattern)
if pattern_index > 0:
before_pattern = decimal_expansion[pattern_index - 1] # Get the digit before the pattern
else:
before_pattern = None
if pattern_index + pattern_length < len(decimal_expansion):
after_pattern = decimal_expansion[pattern_index + pattern_length] # Get the digit after the pattern
else:
after_pattern = None
return f"{pattern} exists in the decimal expansion of {m}/{n} with {before_pattern} appearing before it and {after_pattern} appearing after it."
else:
return "Does not exist"
# Example usage
m = int(input("Enter the value of m: "))
n = int(input("Enter the value of n: "))
pattern = input("Enter the pattern of digits: ")
result = find_decimal_pattern(m, n, pattern)
print(result)
Note: The program assumes that the user will input valid positive integers for 'm' and 'n' and a pattern of digits as input. Proper input validation is not implemented in this program.
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Please write C++ functions, class and methods to answer the following question.
Write a function named "createWord" that accepts a word (string) and a
definition (string). It will return the pointer of a newly created Word object
holding that information if they are valid: word and definition cannot be empty or
all blanks. When it is invalid, it will return nullptr to indicate that it cannot create
such Word object.
In C++, functions are a set of instructions that perform a specific task and return a value to the caller. A class is a user-defined data type that contains data members (variables) and member functions (methods) that operate on those data members. In object-oriented programming, classes provide encapsulation, inheritance, and polymorphism.
A class named "Word" is created in the program below, with data members word and definition, and a constructor method to initialize these data members. A method named "validateWord" is created to check if the word and definition are valid or not.
The "createWord" function accepts two strings as parameters, word and definition, and returns a pointer to a new "Word" object. The function first calls the "validateWord" method to check if the word and definition are valid. If they are, it creates a new "Word" object using the "new" keyword and initializes its data members using the constructor method. If they are not valid, the function returns nullptr to indicate that it cannot create a "Word" object.
```c++
#include
#include
using namespace std;
class Word {
public:
string word;
string definition;
Word(string w, string d) {
word = w;
definition = d;
}
};
class Dictionary {
public:
Word* createWord(string word, string definition) {
if (validateWord(word, definition)) {
Word* w = new Word(word, definition);
return w;
}
else {
return nullptr;
}
}
bool validateWord(string word, string definition) {
if (word.empty() || definition.empty()) {
return false;
}
for (char c : word) {
if (!isalpha(c)) {
return false;
}
}
for (char c : definition) {
if (!isalnum(c) && c != ' ') {
return false;
}
}
return true;
}
};
int main() {
Dictionary dict;
string word, definition;
cout << "Enter a word: ";
getline(cin, word);
cout << "Enter a definition: ";
getline(cin, definition);
Word* w = dict.createWord(word, definition);
if (w == nullptr) {
cout << "Invalid word or definition." << endl;
}
else {
cout << "Word: " << w->word << endl;
cout << "Definition: " << w->definition << endl;
}
delete w;
return 0;
}
```
The program uses a class named "Word" to hold the word and its definition and a class named "Dictionary" to create new "Word" objects. The "createWord" function creates a new "Word" object if the word and definition are valid and returns a pointer to it. Otherwise, it returns nullptr to indicate that it cannot create a "Word" object.
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Create two classes: vehicle and Unmannedvehicle. The class Unmannedvehicle is a subclass that extends the class vehicle. You are also required to write the driver class VehicleInformation, which allows you to test your implementation of vehicle and Unmannedvehicle. The following are implementation details for the classes you need to implement (provided when not self-evident): 1 Vehicle class o Private fields String vehicleName String vehicle Manufacturer int yearBuilt int cost Public class constant field int MINYEARBUILT equals to 1886 (as modern cars were invented in 1886) o getter and setter methods depending on your program design 1 void printinfo() method: Print out the information of the Vehicle, including its name, manufacturer, year built, and cost. An example of the output of this method is as follows: Vehicle Information: Name: RAV4 Manufacturer: Toyota Year built: 2021 Cost: 38000
This is a basic implementation to demonstrate the structure and functionality of the classes. Additional improvements, error handling, and more complex features can be added based on specific requirements.
Here is an example implementation of the requested classes and driver class:
```java
public class Vehicle {
private String vehicleName;
private String vehicleManufacturer;
private int yearBuilt;
private int cost;
public static final int MINYEARBUILT = 1886;
// Constructor
public Vehicle(String vehicleName, String vehicleManufacturer, int yearBuilt, int cost) {
this.vehicleName = vehicleName;
this.vehicleManufacturer = vehicleManufacturer;
this.yearBuilt = yearBuilt;
this.cost = cost;
}
// Getters and setters
public String getVehicleName() {
return vehicleName;
}
public void setVehicleName(String vehicleName) {
this.vehicleName = vehicleName;
}
public String getVehicleManufacturer() {
return vehicleManufacturer;
}
public void setVehicleManufacturer(String vehicleManufacturer) {
this.vehicleManufacturer = vehicleManufacturer;
}
public int getYearBuilt() {
return yearBuilt;
}
public void setYearBuilt(int yearBuilt) {
this.yearBuilt = yearBuilt;
}
public int getCost() {
return cost;
}
public void setCost(int cost) {
this.cost = cost;
}
// Print vehicle information
public void printInfo() {
System.out.println("Vehicle Information:");
System.out.println("Name: " + vehicleName);
System.out.println("Manufacturer: " + vehicleManufacturer);
System.out.println("Year built: " + yearBuilt);
System.out.println("Cost: " + cost);
}
}
public class UnmannedVehicle extends Vehicle {
// Additional fields and methods specific to UnmannedVehicle can be added here
// ...
// Constructor
public UnmannedVehicle(String vehicleName, String vehicleManufacturer, int yearBuilt, int cost) {
super(vehicleName, vehicleManufacturer, yearBuilt, cost);
}
}
public class VehicleInformation {
public static void main(String[] args) {
Vehicle vehicle = new Vehicle("RAV4", "Toyota", 2021, 38000);
vehicle.printInfo();
}
}
```
In this example, the `Vehicle` class represents a vehicle with private fields for `vehicleName`, `vehicleManufacturer`, `yearBuilt`, and `cost`. It also includes getter and setter methods for each field, as well as a `printInfo()` method to display the vehicle's information.
The `UnmannedVehicle` class extends the `Vehicle` class and can have additional fields and methods specific to unmanned vehicles, if needed.
The `VehicleInformation` class serves as the driver class to test the implementation. In the `main` method, a `Vehicle` object is created with specific information and the `printInfo()` method is called to display the vehicle's information.
You can run the `VehicleInformation` class to see the output that matches the example you provided.
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Find all data dependencies using the code below (with forwarding)
loop:
slt $t0, $s1, $s2
beq $t0, $0, end
add $t0, $s3, $s4
lw $t0, 0($t0)
beq $t0, $0, afterif
sw $s0, 0($t0)
addi $s0, $s0, 1
afterif:
addi $s1, $s1, 1
addi $s4, $s4, 4
j loop
end:
Write-after-Write (WAW) dependencies are present in the given code. To identify data dependencies, we need to examine the dependencies between instructions in the code.
Data dependencies occur when an instruction depends on the result of a previous instruction. There are three types of data dependencies: Read-after-Write (RAW), Write-after-Read (WAR), and Write-after-Write (WAW).
Let's analyze the code and identify the data dependencies:
loop:
slt $t0, $s1, $s2 ; No data dependencies
beq $t0, $0, end ; No data dependencies
add $t0, $s3, $s4 ; No data dependencies
lw $t0, 0($t0) ; RAW dependency: $t0 is read before it's written in the previous instruction (add)
beq $t0, $0, afterif ; No data dependencies
sw $s0, 0($t0) ; WAR dependency: $t0 is written before it's read in the previous instruction (lw)
addi $s0, $s0, 1 ; No data dependencies
afterif:
addi $s1, $s1, 1 ; No data dependencies
addi $s4, $s4, 4 ; No data dependencies
j loop ; No data dependencies
end: ; No data dependencies
The data dependencies identified are as follows:
- Read-after-Write (RAW) dependency:
- lw $t0, 0($t0) depends on add $t0, $s3, $s4
- Write-after-Read (WAR) dependency:
- sw $s0, 0($t0) depends on lw $t0, 0($t0)
No Write-after-Write (WAW) dependencies are present in the given code.
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You enter a bakery which sells 5 varieties of cookies. You are going to purchase a
cookie for each of your 12 closest friends.
B.) What if you want to give exactly 4 oatmeal raisin cookies and exactly 5 sugar cookies?
My approach was 12 - 4 - 5 = 3 + 5 - 1 = 7! / 4!
This equation utilizes the form r+n-1/n-1
There are 24 different ways to choose the cookies for the remaining 3 friends when you want to give exactly 4 oatmeal raisin cookies and exactly 5 sugar cookies.
To determine the number of ways to select the cookies for your 12 closest friends, where exactly 4 oatmeal raisin cookies and exactly 5 sugar cookies are chosen, you can use a combination formula.
The total number of cookies to choose for the remaining friends (excluding the 4 oatmeal raisin cookies and 5 sugar cookies) is 12 - 4 - 5 = 3.
To select the remaining cookies, you can use the combination formula:
C(3 + 1, 3) * C(5 + 1, 5) = C(4, 3) * C(6, 5) = 4 * 6 = 24.
Therefore, there are 24 different ways to choose the cookies for the remaining 3 friends when you want to give exactly 4 oatmeal raisin cookies and exactly 5 sugar cookies.
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A homomorphism is an operation on a language that takes each character in the alphabet and converts it into another symbol or string of symbols. For example, we could define a homomorphism on {a, b, c} that converts a into b, b into xx, and c into c. If we apply this conversion to the string aabbc, we would get the new string bbxxxxc. Applying a homomorphism to a language converts every string in the language. Show that the family of context-free languages is closed under homomorphism.
The family of context-free languages is closed under homomorphism, meaning that applying a homomorphism to a context-free language results in another context-free language.
This property allows for character transformations within the language while maintaining its context-free nature.
To show that the family of context-free languages is closed under homomorphism, we need to demonstrate that applying a homomorphism to a context-free language results in another context-free language.
Let's consider a context-free language L defined by a context-free grammar G = (V, Σ, R, S), where V is the set of non-terminal symbols, Σ is the set of terminal symbols (alphabet), R is the set of production rules, and S is the start symbol.
Now, suppose we have a homomorphism h defined on the alphabet Σ, which maps each character in Σ to another symbol or string of symbols.
To show that L' = {h(w) | w ∈ L} is a context-free language, we can construct a new context-free grammar G' = (V', Σ', R', S'), where:
V' = V ∪ Σ' ∪ {X}, where X is a new non-terminal symbol not in V
Σ' = {h(a) | a ∈ Σ}
R' consists of the following rules:
For each production rule A → w in R, add the rule A → h(w).
For each terminal symbol a in Σ, add the rule X → h(a).
Add the rule X → ε, where ε represents the empty string.
The new grammar G' produces strings in L' by applying the homomorphism to each terminal symbol in the original grammar G. The non-terminal symbol X is introduced to handle the conversion of terminal symbols to their respective homomorphism results.
Since L' can be generated by a context-free grammar G', we conclude that the family of context-free languages is closed under homomorphism.
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11. We can review the values in the TVM registers by simply pressing the key of the value we want to review. (T or F) 12. Values can be entered in the TVM registers in any order. (T or F ) 13. When entering dollar amounts in the PV, PMT, and FV registers, we should enter amounts paid as positive numbers, and amounts received as negative numbers. ( T or F ) 14. Suppose you are entering a negative $300 in the PMT register. Keystrokes are: [−]300 [PMT]. (T or F) 15. If you make a total of ten $50 payments, you should enter $500 in the PMT register. (T or F)
We can review the values in the TVM registers by simply pressing the key .False. Values cannot be entered in the TVM registers in any order. Hence, the answer is as follows:True. False. True. True. True.
When entering dollar amounts in the PV, PMT, and FV registers, we should enter amounts paid as positive numbers, and amounts received as negative numbers.True. Suppose you are entering a negative $300 in the PMT register. Keystrokes are: [−]300 [PMT].15. True. If you make a total of ten $50 payments, you should enter $500 in the PMT register.True. We can review the values in the TVM registers by simply pressing the key of the value we want to review.
False. Values cannot be entered in the TVM registers in any order. TVM refers to time value of money which is a financial concept.13. True. When entering dollar amounts in the PV, PMT, and FV registers, we should enter amounts paid as positive numbers, and amounts received as negative numbers.True. Suppose you are entering a negative $300 in the PMT register. Keystrokes are: [−]300 [PMT]. True. If you make a total of ten $50 payments, you should enter $500 in the PMT register.In total, there are five statements given, each of which is either true or false.
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Predictor (TAP) component of TAPAS framework for Neural Network (NN) architecture search.
1) TAP predicts the accuracy for a NN architecture by only training for a few epochs and then extrapolating the performance.
2) TAP predicts the accuracy for a NN architecture by not training the candidate network at all on the target dataset.
3) It employs a 2-layered CNN with a single output using softmax.
4) TAP is trained on a subset of experiments from LDE each time a new target dataset is presented for which an architecture search needs to be done.
The correct answer is option 1.
TAP (Predictor) is a component of the TAPAS framework for Neural Network (NN) architecture search. It predicts the accuracy of a NN architecture by only training for a few epochs and then extrapolating the performance.
A neural network (NN) is a computational method modeled after the human brain's neural structure and function. An NN has several layers of artificial neurons, which are nodes that communicate with one another through synapses, which are modeled after biological neurons. The neural network's training algorithm is a method for modifying the connections between artificial neurons to generate a desired output for a given input. Architecture search is a process of automatically discovering optimal neural network architectures for a given task. To address this problem, a framework for neural architecture search called TAPAS is proposed. It utilizes a two-level optimization strategy to iteratively optimize both the network's architecture and its weights. TAP has three components, i.e., Predictor, Sampler, and Evaluator. TAPAS employs a two-layered CNN with a single output using softmax. It is trained on a subset of experiments from LDE each time a new target dataset is presented for which an architecture search needs to be done.
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