AP CSP Review

The two code segments below are each intended to display the average of the numbers in the list numList. Assume that numList contains more than one value.

Which of the choices below best describes the two code segments?

• Code segment I displays the correct average, but code segment II does not.

• Code segment II displays the correct average, but code segment I does not.

• Both code segments display the correct average, but code segment I requires more arithmetic operations than code segment II.

• Both code segments display the correct average, but code segment II requires more arithmetic operations than code segment I.

The program below is intended to count the number of prime numbers in a list called numbers and display

the result. The program uses the procedure is Prime (n), which returns true if n is a prime number and false otherwise.

The program does not work as intended.

Which two lines of code should be removed so that the program will work as intended?

Select two answers.

• line 1

• line 4

• line 7

• line 9

• The number of mice increases by 1 each day.

• The number of mice does not change from day to day.

• The number of predators increases by 1 each day.

• The number of predators does not change from day to day.

Which of the following can be used to combine two strings to create a new string?

• concatenation
• algorithm
• conditional
• variable

What is a sequence of instructions which a computer runs to perform a desired task?

• program

• compiler

• assembly

• algorithm

Which expression evaluates to the highest (largest) number?

• 16 MOD 5-2

• 16 MOD (5-2)

• 2*16 MOD 5

• 5 MOD 16* 2

Which of the following protocols is primarily used to establish a secure connection between browsers and servers so that no data is lost?

• HTTP
• SMTP
• SSL/TLS
• TCP/IP

Which of the following is TRUE about routers? 

• One "root" router is responsible for communication to all "sub-routers"
• Routers act independently
• A path is established before the message is sent

An online retailer uses an algorithm to sort a list of n items by price. The table above shows the approximate number of steps the algorithm takes to sort lists of different sizes.

Based on the values in the table, which of the following best characterizes the algorithm for very large values of n?

• The algorithm runs in reasonable time.

• The algorithm runs, but not in reasonable time.

• The algorithm attempts to solve an undecidable problem.

• The algorithm attempts to find an approximate solution whenever it fails to find an exact solution.

A user's computer is communicating with a web site securely using asymmetric encryption.

The user's computer is encrypting and sending a message to the website. Which key will be used to decrypt the message?

• The user computer's public key

• The user computer's private key

• The web site's public key

• The web site's private key