AP Computer Science Principles Final Review

For the following question, circle the best answer.
What will be the value of sum1 after this code runs?

• 4
• 1
• 40
• 10

Why do we compress data?

I. To save memory space on devices
II. To speed up the time it takes to send a file over the internet
III. The computation it takes to decompress data is cheaper than the storage space required to store uncompressed data

• I only
• I and II
• I, II, and III
• III only

Which of the following are true about Internet routing?

I. For any two points on the Internet, there exists only one path between the two points
II. Routing on the Internet is fault-tolerant and redundant

• I only
• II only
• Both I and II
• Neither I and II

Which of the following statements are true about using visualizations to display a dataset?

I. Visualizations are visually appealing but don’t help the viewer understand relationships that exist in the data
II. Visualizations like graphs, charts, or visualizations with pictures are useful for conveying information, while tables just filled with text are not useful.
III. Patterns that exist in the data can be found more easily by using a visualization

• I and II
• II and III
• I, II, and III
• III only

Karel the Dog is instructed to move forward one space. Then, if Karel is standing on a ball, Karel will turn right. Otherwise, Karel will move forward two spaces. Given the starting point below, where will Karel end up?

• a
• b
• c
• d

Which of the following statements are true about the Internet?

I. The entire global population has Internet access
II. Widespread use of the Internet has led to concerns around privacy and copyright
III. Internet communication uses standard protocols that are used by all devices on the Internet
IV. The Internet connects devices and networks all over the world

• I and II
• I and IV
• II, III, and IV
• I, II, III, and IV