AP CSP Review

Consider the following code segment to the left.

Which of the variables have the value 50 after executing the code segment?

• x only

• y only

• x and z only

• x, y, and z

Consider the following code segment to the left.

What is the value of r as a result of executing the code segment?

• 10

• 20

• 30

• 40

The variable age is to be used to represent a person’s age, in years. Which of the following is the most appropriate data type for age ?

• Boolean

• integer

• float

• string

• list

A student is creating an algorithm to display the distance between the numbers num1 and num2 on a number line. The following table shows the distance for several different values.

Which of the following algorithms displays the correct distance for all possible values of num1 and num2 ?

• Step 1:

  Add num1 and num2 and store the result in the variable sum.

   Step 2:    Take the absolute value of sum and display the result.

• Step 1:

  Subtract num1 from num2 and store the result in the variable diff.

  Step 2:

  Take the absolute value of diff and display the result.

• Step 1:

  Take the absolute value of num1 and store it in the variable absNum1.

  Step 2:

  Take the absolute value of num2 and store it in the variable absNum2.

  Step 3:

  Add absNum1 and absNum2 and display the result.

• Step 1:

  Take the absolute value of num1 and store it in the variable absNum1.

  Step 2:

  Take the absolute value of num2 and store it in the variable absNum2.

  Step 3:

  Subtract absNum1 from absNum2 and display the result.

Three words are stored in the variables word1, word2, and word3. The values of the variables are to be updated as shown in the following table.

Which of the following code segments can be used to update the values of the variables as shown in the table?

• temp ← word1

  word3 ← word1

  word1 ← temp

• temp ← word1

  word1 ← word3

  word3 ← temp

• temp ← word1

  word1 ← word2

  word2 ← word3

  word3 ← temp

• temp ← word3

  word3 ← word2

  word2 ← word1

  word1 ← temp

Consider the following procedures for string manipulation.

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)

To qualify for a particular scholarship, a student must have an overall grade point average of 3.0 or above and must have a science grade point average of over 3.2. Let overallGPA represent a student’s overall grade point average and let scienceGPA represent the student’s science grade point average. Which of the following expressions evaluates to true if the student is eligible for the scholarship and evaluates to false otherwise?

• (overallGPA > 3.0) AND (scienceGPA > 3.2)

• (overallGPA > 3.0) AND (scienceGPA ≥ 3.2)

• (overallGPA ≥ 3.0) AND (scienceGPA > 3.2)

• (overallGPA ≥ 3.0) AND (scienceGPA ≥ 3.2)

A programmer is creating an algorithm that will be used to turn on the motor to open the gate in a parking garage. The specifications for the algorithm are as follows.

The gate should not open when the time is outside of business hours.

The motor should not turn on unless the gate sensor is activated.

The motor should not turn on if the gate is already open.

Which of the following algorithms can be used to open the gate under the appropriate conditions?

• Check if the time is outside of business hours. If it is, check if the gate sensor is activated. If it is, check if the gate is closed. If it is, turn on the motor.

• Check if the time is during business hours. If it is, check if the gate sensor is activated. If it is, check if the gate is open. If it is, turn on the motor.

• Check if the time is during business hours. If it is, check if the gate sensor is activated. If it is not, check if the gate is open. If it is not, turn on the motor.

• Check if the time is during business hours. If it is, check if the gate sensor is activated. If it is, check if the gate is open. If it is not, turn on the motor.

Three teams (Team A, Team B, and Team C) are participating in a trivia contest. Let scoreA represent the number of correct questions for Team A, scoreB represent the number of correct questions for Team B, and scoreC represent the number of correct questions for Team C. Assuming no two teams get the same number of correct questions, which of the following code segments correctly displays the team with the highest number of correct questions?

• 
• 
• 
• 

Consider the following code segment.

If the value of score1 is 350 and the value of score2 is 210, what will be the value of result after the code segment is executed?

• 3

• 4

• 5

• 7