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WGU Scripting and Programming Foundations Exam Sample Questions (Q18-Q23):

NEW QUESTION # 18
What is one task that could be accomplish using a while loop?

A. When the user Inputs a number, the program outputs "True" when the number Is a multiple of 10
B. After inputting two numbers, the program prints out the larger of the two
C. A user is asked to enter a password repeatedly until either a correct password is entered or five incorrect attempts have been made.
D. The user inputs an integer, and the program prints out whether the number is even or odd and whether the number Is positive, negative, or zero.

Answer: C

Explanation:
A while loop is used to repeatedly execute a block of code as long as a specified condition is true. In the context of the given options:
* Option A could use a simple if-else statement to compare two numbers and print the larger one.
* Option B is a classic example of a use case for a while loop. The loop can run until the correct password is entered or the maximum number of attempts is reached.
* Option C could be accomplished with a single if statement to check if the number is a multiple of 10.
* Option D can also be done with an if-else statement to check the properties of the number.
Therefore, the task that is best suited for a while loop is Option B, where the user is asked to enter a password repeatedly until a correct password is entered or a certain number of incorrect attempts have been made. This requires the program to loop through the password prompt and check the conditions after each input, which is what while loops are designed for.

NEW QUESTION # 19
Which problem is solved by Dijkstra's shortest path algorithm?

A. Given an alphabetized list of race entrants and a person's name, is the person entered in the race?
B. Given the coordinates of five positions, what is the most fuel-efficient flight path?
C. Given an increasing array of numbers, is the number 19 in the array?
D. Given two newspaper articles, what is the greatest sequence of words shared by both articles?

Answer: B

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Dijkstra's shortest path algorithm finds the shortest path between nodes in a weighted graph, often used for navigation or network routing. According to foundational programming principles (e.g., Certiport Scripting and Programming Foundations Study Guide, Section on Algorithms), it is designed for problems involving optimal paths in graphs with non-negative edge weights.
* Option A: "Given an increasing array of numbers, is the number 19 in the array?" This is incorrect. This is a search problem, typically solved by binary search for a sorted array, not Dijkstra's algorithm, which deals with graphs.
* Option B: "Given an alphabetized list of race entrants and a person's name, is the person entered in the race?" This is incorrect. This is another search problem, solvable by binary search or linear search, not related to graph paths.
* Option C: "Given two newspaper articles, what is the greatest sequence of words shared by both articles?" This is incorrect. This is a longest common subsequence (LCS) problem, solved by dynamic programming, not Dijkstra's algorithm.
* Option D: "Given the coordinates of five positions, what is the most fuel-efficient flight path?" This is correct. This describes a shortest path problem in a graph where nodes are positions (coordinates) and edges are distances or fuel costs. Dijkstra's algorithm can find the most efficient path (e.g., minimizing fuel) between these points, assuming non-negative weights.
Certiport Scripting and Programming Foundations Study Guide (Section on Algorithms).
Cormen, T.H., et al., Introduction to Algorithms, 3rd Edition (Dijkstra's Algorithm, Chapter 24).
GeeksforGeeks: "Dijkstra's Shortest Path Algorithm" (https://www.geeksforgeeks.org/dijkstras-shortest-path- algorithm-greedy-algo-7/).

NEW QUESTION # 20
What is a feature of a compiled programming language?

A. The code does not require being translated into machine code but can be run by a separate program called a compiler.
B. The code must be compiled into machine code in the form of an executable file before execution.
C. The program usually runs slower than an interpreted language.
D. The code runs directly one statement at a time by another program called a compiler.

Answer: B

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
A compiled programming language is one where the source code is translated into machine code (or an intermediate form) by a compiler before execution. According to foundational programming principles (e.g., Certiport Scripting and Programming Foundations Study Guide), this process results in an executable file that can run independently of the compiler.
* Option A: "The program usually runs slower than an interpreted language." This is incorrect. Compiled languages (e.g., C, C++) typically produce machine code that runs faster than interpreted languages (e.
g., Python), as the translation to machine code is done beforehand, avoiding runtime interpretation overhead.
* Option B: "The code runs directly one statement at a time by another program called a compiler." This is incorrect. A compiler translates the entire program into machine code before execution, not one statement at a time. Running code one statement at a time is characteristic of an interpreter, not a compiler.
* Option C: "The code must be compiled into machine code in the form of an executable file before execution." This is correct. In compiled languages like C or Java (which compiles to bytecode), the source code is translated into machine code or an intermediate form (e.g., .exe or .class files) that can be executed directly by the machine or a virtual machine.
* Option D: "The code does not require being translated into machine code but can be run by a separate program called a compiler." This is incorrect. A compiler's role is to translate code into machine code.
Running code without translation describes an interpreted language, and the term "compiler" is misused here.
Certiport Scripting and Programming Foundations Study Guide (Section on Compiled vs. Interpreted Languages).
C Programming Language Standard (ISO/IEC 9899:2011).
W3Schools: "C Introduction" (https://www.w3schools.com/c/c_intro.php).

NEW QUESTION # 21
A program allows the user to play a game. At the end of each game, the program asks the user if they want to play again.
Which programming structure on its own is appropriate to accomplish this task?

A. If-else statement
B. One while loop
C. Nested for loops
D. One for loop

Answer: B

Explanation:
The most appropriate programming structure to repeatedly ask a user if they want to play a game again is a while loop. This is because a while loop can execute a block of code as long as a specified condition is true. In this case, the condition would be whether the user wants to play again or not. The while loop will continue to prompt the user after each game and will only exit if the user indicates they do not want to play again. This makes it an ideal choice for tasks that require repeated execution based on user input.
For loops are generally used when the number of iterations is known beforehand, which is not the case here as we cannot predict how many times a user will want to play the game. Nested for loops and if-else statements are not suitable for repeating tasks based on dynamic user input.
References:
* Loops in Programming - GeeksforGeeks1
* Use the right loop to repeat tasks - Learn programming with Java - OpenClassrooms2
* Using For and While Loops for User Input in Python - Stack Abuse3

NEW QUESTION # 22
What does the following algorithm determine?

A. Whether x is odd
B. Whether x is even
C. Whether x is evenly divisible by 2 or 3
D. Whether x r> negative. 0, <x positive

Answer: A

Explanation:
The algorithm provided in the image performs a modulo operation with 2 (x % 2) and checks if the result is 1.
In programming, the modulo operation gives the remainder of the division of two numbers. For any integer x, if x % 2 equals 1, it means that x is odd because it has a remainder of 1 when divided by 2. Even numbers, when divided by 2, have no remainder and thus would return 0 in a modulo 2 operation.

NEW QUESTION # 23
......

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