APCS Principles Practice Exam

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

4 <- 1

s <- 2

t <- 3

r <- s

s <- t

DISPLAY(r)

DISPLAY(s)

What is displays as a result of running the code segment?

• 1 1

• 1 2

• 2 3

• 3 2

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

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

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

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

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

Which of the following best explains what happens when a new device is connected to the Internet?

• A device Driver is assigned to the device

• An IP address is assigned to the device

• A packet number is assigned to the device

• A Web site is assigned to the device

Consider the code segment.

Which of the following replacements for <MISSING CONDITION> will result in an infinite loop?

• j = 6

• j ≥ 6

• j = 7

• j > 7

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 heads_counter and flip_counter to 0

Step 2: A variable coin_flip is randomly assigned a value of either 0 or 1.

Step 3: Increment the value of flip_counter by 1.

Step 4: Repeat step 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?

• coin_flip = 1

• flip_counter = 1

• flip_counter = 2

• heads_counter = 2

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?

• Iteration

• Searching

• Selection

• Sequencing

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

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

• Paying a bill using a secure electronic payment system

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

• Withdrawing money from a bank account using an automated teller machine

The code segment uses the procedure IsFound(list, item), which returns true if item appears in list and returns false otherwise. The list resultList is initially empty

Which of the following best describes the contents of resultList after the code segment is executed?

• All elements in inputList1 followed by all elements in inputList2

• Only elements that appear in both inputList1 and inputList2

• Only elements that appear in either inputList1 or inputList2 but not in both lists

• Only elements that appear in inputList1 but not in inputLists2

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?

• How long the program takes to run

• How many programming statements the program contains

• How much memory the program requires as it runs

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

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

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

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

• 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