Question 1

Consider the following code segment, which uses the variables r, s, and t.

Accepted Answer

2 3

Answer

3 2

Answer

1 2

Answer

1 1

Question 2

Which of the following is a true statement about program documentation?

Accepted Answer

Program documentation is useful during initial program development and also when modifications are made to existing programs.

Answer

Program documentation is useful when programmers collaborate but not when a programmer works individually on a project.

Answer

Program documentation is only needed for programs in development; it is not needed after a program is completed.

Answer

Program documentation should not be changed after it is first written.

Question 3

The algorithm below is used to simulate the results of flipping a coin 4 times. Consider the goal of determining whether the simulation resulted in an equal number of heads and tails.

Step 1 : Initialize the variables heads_counter and flip_counter to 0.

Step 2 : A variable coin_flip is randomly assigned a value of either 0 or 1. If coin_flip has the value 0, the coin flip result is heads, so heads_counter is incremented by 1.

Step 3 : Increment the value of flip_counter by 1.

Step 4 : Repeat steps 2 and 3 until flip_counter equals 4.

Following execution of the algorithm, which of the following expressions indicates that the simulation resulted in an equal number of heads and tails?

Accepted Answer

heads_counter = 2

Answer

flip_counter = 1

Answer

flip_counter = 2

Answer

coin_flip = 1

Question 4

An algorithm has been developed to compute the sum of all the elements in a list of integers. Which of the following programming structures must be added to the existing algorithm so that the new algorithm computes the sum of only the even integers in the list?

Accepted Answer

Selection

Answer

Iteration

Answer

Sequencing

Answer

Searching

Question 5

An algorithm has been designed to display each element in a list of names. Which programming structure is necessary to ensure each name in the list is displayed, one after the other?

Accepted Answer

Iteration

Answer

Searching

Answer

Sequencing

Answer

Selection

Question 6

A program requires steps to be executed in a specific order: first reading input, then processing the data, and finally displaying the result. Which programming structure is responsible for ensuring that these steps happen in the correct order?

Accepted Answer

Sequencing

Answer

Selection

Answer

Searching

Answer

Iteration

Question 7

Which of the following scenarios requires the use of iteration?

Accepted Answer

Printing all even numbers in a list

Answer

Checking if a number is positive or negative

Answer

Adding two numbers and displaying the result

Answer

Exiting a program when a specific condition is met

Question 8

An algorithm needs to execute the following steps in sequence: initialize a counter, set the counter to zero, then start adding values to the counter from a list. Which of the following terms best describes the need to follow these steps in a specific order?

Accepted Answer

Sequencing

Answer

Recursion

Answer

Selection

Answer

Iteration

Question 9

In a program that reads a list of items and then sorts them alphabetically before displaying them, what role does sequencing play?

Accepted Answer

Ensures that items are read before sorting and displaying

Answer

Ensures only specific items are displayed

Answer

Ensures each item is displayed once

Answer

Determines which items need to be displayed

Question 10

Which of the following activities poses the greatest personal cybersecurity risk?

Accepted Answer

Reserving a hotel room by e-mailing a credit card number to a hotel

Answer

Paying a bill using a secure electronic payment system

Answer

Withdrawing money from a bank account using an automated teller machine (ATM)

Answer

Making a purchase at an online store that uses public key encryption to transmit credit card information

Question 11

A programmer is writing a program that is intended to be able to process large amounts of data. Which of the following considerations is LEAST likely to affect the ability of the program to process larger data sets?

Accepted Answer

How many programming statements the program contains

Answer

How much memory the program requires as it runs

Answer

How long the program takes to run

Answer

How much storage space the program requires as it runs

Question 12

Which of the following is LEAST likely to indicate a phishing attack?

Accepted Answer

An e-mail from your bank asks you to call the number on your card to verify a transaction

Answer

An e-mail from a merchant asks that you click on a link to reset your password

Answer

An e-mail from a utility company asks you to enter your date of birth and social security number for verification purposes

Answer

An e-mail indicates that you have won a large sum of money and asks you to enter your bank account number so that the money can be transferred to you

Question 13

Which of the following is considered an unethical use of computer resources?

Accepted Answer

Purchasing a single-user copy of photo editing software and installing it on all the computers in a computer lab

Answer

Searching online for an electronic version of a school textbook

Answer

Purchasing a game from an app store and downloading it directly to a mobile device

Answer

Downloading freeware or shareware onto your home computer

Question 14

Which of the following statements are true about using a high-level programming language instead of a lower-level language?

I. Programs written in a high-level language are generally easier for people to read than programs written in a low-level language.

II. A high-level language provides programmers with more abstractions than a low-level language.

III. Programs written in a high-level language are generally easier to debug than programs written in a low-level language.

Accepted Answer

I, II, and III only

Answer

I only

Answer

I and III only

Answer

II and III only

Question 15

What is displayed as a result of executing the algorithm in the flowchart?

Accepted Answer

5

Answer

15

Answer

1 2 3 4

Answer

1 2 3 4 5

Question 16

A city government is attempting to reduce the digital divide between groups with differing access to computing and the Internet. Which of the following activities is LEAST likely to be effective in this purpose?

Accepted Answer

Putting all government forms on the city Web site

Answer

Holding basic computer classes at community centers

Answer

Providing free wireless Internet connections at locations in low-income neighborhoods

Answer

Requiring that every city school has computers that meet a minimum hardware and software standard

Question 17

SELECT TWO ANSWERS

Which of the following Boolean expressions are equivalent to the expression num ≥ 15 ?

Question 18

Which of the following are benefits of using well-named variables in a computer program?

Select two answers.

Question 19

A school library allows students to borrow laptops. A computer program is used to count the number of times a particular laptop has been borrowed from the library (borrows) and the number of times the same laptop has been returned to the library (returns). Which of the following indicate that a particular laptop is not currently borrowed?

Select two answers

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