AP CSP-Review Session 1 MCQ Quiz

A numeric test score is to be converted to a letter grade of A, B, or C according to the following rules: A score greater than 90 is considered an A; a score between 80 and 90, inclusive, is considered a B; and any other score is considered a C. Which of the following code segments will assign the correct letter grade to grade based on the value of the variable score?

• A. II only

• B. I and II only

• C. I and III only

• D. II and III only

In the above procedure, assume that the parameter x is an integer. Which of the following best describes the behavior of the procedure?

• A. It displays nothing if x is negative and displays true otherwise.

• B. It displays nothing if x is negative and displays false otherwise.

• C. It displays true if x is negative and displays nothing otherwise.

• D. It displays true if x is negative and displays false otherwise.

A student wrote the code segment above, which displays true if the list myList contains any duplicate values and displays false otherwise. The code segment compares pairs of list elements, setting containsDuplicates to true if any two elements are found to be equal in value. Which of the following best describes the behavior of how pairs of elements are compared?

• The code segment iterates through myList, comparing each element to all other elements in the list.

• The code segment iterates through myList, comparing each element to all subsequent elements in the list.

• The code segment iterates through myList, comparing each element to the element that immediately follows it in the list.

• The code segment iterates through myList, comparing each element to the element that immediately precedes it in the list.

A homework assignment consists of 10 questions. The assignment is graded using the chart to the right. Let numCorrect represent the number of correct answers for a particular student. The code segment to the left is intended to display the appropriate grade based on numCorrect. The code segment does not work as intended in all cases. For which of the values of numCorrect does the code segment NOT display the intended grade? Select TWO answers.

• A. 9

• B. 8

• C. 7

• D. 6

In the code segment shown, score and penalty are initially positive integers. The code segment is intended to reduce the value of score by penalty. However, if doing so would cause score to be negative, score should be assigned the value 0. The code segment does not work as intended. Which of the following changes can be made so that the code segment works as intended?

• A. Changing line 1 to IF(score < 0)

• B. Changing line 1 to IF(score + penalty < 0)

• C. Changing line 7 to score ← score + penalty

• D. Interchanging lines 3 and 7

Consider the code segment above. p ← 10 q ← 20 r ← 30 s ← 40 p ← q q ← r s ← q r ← p What is the value of r as a result of executing the code segment?

• A. 10

• B. 20

• C. 30

• D. 40

Three words are stored in the variables word1, word2, and word3. The values of the variables are to be updated as shown in the table below: | Variable | Value Before Updating | Value After Updating | |----------|----------------------|---------------------| | word1 | "xylophone" | "zebra" | | word2 | "yarn" | "yarn" | | word3 | "zebra" | "xylophone" | Which of the following code segments can be used to update the values of the variables as shown in the table?

• A. temp ← word1 word3 ← word1 word1 ← temp

• B. temp ← word1 word1 ← word3 word3 ← temp

• C. temp ← word1 word1 ← word2 word2 ← word3 word3 ← temp

• D. temp ← word3 word3 ← word2 word2 ← word1 word1 ← temp

Consider the shown procedures for string manipulation. Procedure Call | Explanation concat(str1, str2) | Returns a single string consisting of str1 followed by str2. For example, concat("key", "board") returns "keyboard" prefix(str, length) | Returns the first length characters of str or str if length is greater than the number of characters in str. For example, prefix("delivery", 3) returns "del" and prefix("delivery", 100) returns "delivery" The variable initials is to be assigned a string consisting of the first letter of the string firstName followed by the first letter of the string lastName. Which of the following assigns the correct string to initials?

• initials ← concat(prefix(firstName, 1), prefix(lastName, 1))

• initials ← concat(prefix(firstName, 2), prefix(lastName, 2))

• initials ← prefix(concat(firstName, lastName), 1)

• initials ← prefix(concat(firstName, lastName), 2)

The following code segment is used to determine whether a customer is eligible for a discount on a movie ticket. val1 ← (NOT (category = "new")) OR (age ≥ 65) val2 ← (category = "new") AND (age < 12) If category is "new" and age is 20, what are the values of val1 and val2 as a result of executing the code segment?

• A. val1 = true, val2 = true

• B. val1 = true, val2 = false

• C. val1 = false, val2 = true

• D. val1 = false, val2 = false

A software development company has created an application called FileCleanUp. When the application is run on a user device, it searches for all files (including pictures, videos, and documents) that have not been accessed in the past month, stores them on the company’s Web server, and deletes them from the user device. The application runs once each day. Users have the ability to manually retrieve files from the server if they are needed.

• It prevents users from accessing frequently used files when there is no Internet connectivity.

• It prevents users from accessing infrequently used files when there is no Internet connectivity.

• It prevents users from accessing frequently used files when there is reliable Internet connectivity.

• It prevents users from accessing infrequently used files when there is reliable Internet connectivity.