University:
Kentucky State University
Course:
COS 232| Programming I
Academic year:

2024
Views:

174

Pages:

4
Author:

Hallie Randolph

Solution Reference for What Does this Algorithm Do? Question: 1 Consider the code segment below. temp ← x x ← y y ← temp Based on the code segment, how would you best describe what the program is doing to variable x and variable y? ✔ The program swaps the value of x and y The program sets the value of x to y The program sets the value of y to x The program sets the value of temp to x and then to y Question: 2 Consider the code segment below. DISPLAY ("What is your name?") name ← INPUT () DISPLAY ("Hello") DISPLAY (name) What is displayed as a result if the user inputs “Karel” to the program? What is your name? Hello Karel What is your name?HelloKarel ✔ What is your name? Hello Karel Hello Karel Question: 3 Consider the code segment below. PROCEDURE Mystery (number) { RETURN ((number MOD 2) = 0) } Which of the following best describes the behavior of the Mystery PROCEDURE? Returns the remainder of number divided by 2 ✔ Returns whether or not number is even Returns number divided by 2 Returns whether or not number is equal to 0 Question: 4 In the program below, the initial value of a is 0 and the initial value of b is 1. IF (b = 0) { IF (b = 1) { DISPLAY ("Karel") } } ELSE { IF (a = 1) { DISPLAY ("Tracy") } ELSE { DISPLAY ("Dog") } DISPLAY ("Turtle") } What is displayed as a result of running this program? Karel Dog Tracy Turtle Tracy Dog ✔ Dog Turtle Question: 5 Consider the code segment below. PROCEDURE Mystery (number) { DISPLAY ("WOW") REPEAT number TIMES { DISPLAY ("!") } } What is the result of calling the Mystery procedure with an input of 3? WOW!!! ✔ WOW ! ! ! WOW ! ! ! !!! Question: 6 Consider the code segment below. x ← RANDOM (1, 10) y ← RANDOM (10, 20) DISPLAY (x = y) Which of the following best describes the behavior of the the code? The program will always display true The program will always display false ✔ The program could display either true or false The program will error Question: 7 Consider the code segment below. PROCEDURE Mystery (word, list) { FOR EACH item IN list { IF (item = word) { RETURN (true) } } } RETURN (false) Which of the following best describes the behavior of the Mystery PROCEDURE? ✔ Return whether or not word is in list Return the index of word in list Display true for each occurrence of word in list Display the index of word in list Question: 8 Consider the code segment below. PROCEDURE Mystery (word, list) { x ← 0 y ← 0 FOR EACH item IN list { IF (item = word) { x ← x + 1 } ELSE { x ← 0 } IF (x > y) { y ← x } } } RETURN (y) What is the value of Mystery("karel", ["karel", "karel", "tracy", "karel", "karel", "karel", "tracy"]) 2 ✔ 3 4 5

Analyzing the Purpose of an Algorithm

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