AP Computer Science Principles Unit 2 Review

A large office building has an elevator that carries occupants between any of the building's 10 floors. The basement is referred to as "Level 0" while the topmost floor is "Level 9." The software for the elevator uses a variable, called level, to track the floor number of the elevator's current position. When a person presses a button requesting the elevator to rise to a higher floor, the above code is executed.

What is displayed if the elevator is currently on the 7th floor (level = 7) and the person on the elevator presses a button that says to go up 3 floors (floors = 3)?

• Level 7 Level 8 Level 9

• Level 8 Level 9 Cannot go up. Level 9

• Level 8 Level 9 Level 10

• Cannot go up.

Consider the above code segments designed to find the area of a triangle (A = 1/2 bh).

Which of the following statements about the above programs is true?

• Both programs will work as intended, but Program B is more readable.

• Program A will work as intended, but Program B will not work as intended.

• Program B will work as intended, but Program A will not work as intended.

• Neither program will work as intended.

Given the above code segment, what would be displayed if age were initialized with a value of 18?

• group 1

• group 2

• group 1 group 2

• Nothing will be displayed

Which of the following would be the most appropriate name for a variable?

• variable1

• t

• amountOfTimeRemainingInTheGame

• time_left

While developing a program, you find a similar project that someone has created and posted online. It contains a number of elements (e.g., images, music, code segments, etc.) that you would like to integrate into your own project. Under what conditions may you reuse these elements in your work?

• You may never reuse someone else’s work.

• You may reuse any elements that are posted publicly online as long as credit is given to their creator.

• You may only reuse elements for which the original owner has granted a license to reuse, such as the Creative Commons Share Alike license.

• You may always reuse anything that is posted publicly or privately online.

Consider the above code.

Assuming that before this code is run, x = 1. What would be displayed at the end?

• 2¹⁰

• 16

• 8

• 1

What condition will make the above an infinite loop?

• y = -108

• y≠-3

• y ≥ 8

• y < -53

Consider the above code segment.

Which of the following best describes the result of running the code segment?

• The number 0 is displayed.

• The number 4 is displayed.

• The number 10 is displayed.

• Nothing is displayed; the program results in an infinite loop.

The volume of a rectangular prism is calculated by multiplying its length, width and height. What could be substituted into the section of the code marked < missing code > that would accurately calculate the volume based on the user input of l, w and h?

• l x w x h

• l * w * h

• l(w)(h)

• l / w / h