AP Computer Science UPDATED ACTUAL Questions and CORRECT Answers

AP Computer Science UPDATED ACTUAL
Questions and CORRECT Answers
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? (2)
(A) Iteration
(B) Searching
(C) Selection

(D) Sequencing - CORRECT ANSWER✔✔- C. Selection


The code segment below uses the procedure IsFound (list, item), which returns true if item
appears in list and returns false otherwise. The list resultList is initially empty.
FOR EACH item IN inputList1
{
IF (IsFound (inputList2, item)
{
APPEND (resultList, item)
}
}
Which of the following best describes the contents of resultList after the code segment is
executed? (2)
(A) All elements in inputList1 followed by all elements in inputList2
(B) Only elements that appear in both inputList1 and inputList2
(C) Only elements that appear in either inputList1 or inputList2 but not in both lists
(D) Only elements that appear in inputList1 but not in inputList2 - CORRECT
ANSWER✔✔- (B) Only elements that appear in both inputList1 and inputList2


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? (2)
(A) How long the program takes to run
(B) How many programming statements the program contains

, (C) How much memory the program requires as it runs

(D) How much storage space the program requires as it runs - CORRECT ANSWER✔✔- (B)
How many programming statements the program contains


Which of the following statements are true about using a high-level programming language
instead of a lower-level language? (2)
Programs written in a high-level language are generally easier for people to read than
programs written in a low-level language.
A high-level language provides programmers with more abstractions than a low-level
language.
Programs written in a high-level language are generally easier to debug than programs
written in a low-level language.
(A) I only
(B) I and III only
(C) II and III only

(D) I, II, and III - CORRECT ANSWER✔✔- (D) I, II, and III


A student is recording a song on her computer. When the recording is finished, she saves a
copy on her computer. The student notices that the saved copy is of lower sound quality than
the original recording. Which of the following could be a possible explanation for the
difference in sound quality? (2)
(A) The song was saved using fewer bits per second than the original song.
(B) The song was saved using more bits per second than the original song.
(C) The song was saved using a lossless compression technique.
(D) Some information is lost every time a file is saved from one location on a computer to
another location. - CORRECT ANSWER✔✔- (A) The song was saved using fewer bits per
second than the original song.


Computers are often used to search through large sets of data to find useful patterns in the
data. Which of the following tasks is NOT an example where searching for patterns is needed
to produce useful information? (2)
(A) A credit card company analyzing credit card purchases to identify potential fraudulent
charges
(B) A grocery store analyzing customers' past purchases to suggest new products the
customer may be interested in