AP CSP Midterm Practice Questions

Front

Which of the following best describes how text is stored on a computer? As images of letters, As binary codes representing characters (ASCII/Unicode), As strings of hexadecimal values only, As spoken sound files

Back

As binary codes representing characters (ASCII/Unicode)

Front

Which of the following best represents how a digital image is stored? A collection of text labels for each color, Binary values representing pixel colors, Sequences of sound wave frequencies, A continuous analog signal

Back

Binary values representing pixel colors

Front

Which of the following is true about lossless compression? Some data is permanently lost., Original data can be reconstructed exactly., It always produces smaller files than lossy compression., It is only used for video.

Back

Original data can be reconstructed exactly.

Front

Which type of compression is used when quality can be reduced to save space?

Back

Lossy

Front

A photo saved as a PNG file has a larger size than the same photo saved as a JPEG. Why?

Back

PNG is lossless, so no data is removed.

Front

Which of the following is an example of data abstraction? Storing multiple values in a list, Using binary to represent a number, Displaying text on a screen, Adding two numbers

Back

Storing multiple values in a list

Front

Which of the following best describes metadata?

Back

Data about the content, such as file size and resolution

Front

Which of these is an advantage of big data? It removes all privacy concerns., It can reveal patterns and trends across large populations., It is always perfectly accurate., It guarantees unbiased decision-making.

Back

It can reveal patterns and trends across large populations.

Front

Which of the following is an ethical concern with data collection? Using encryption to protect information, Large datasets being used without user consent, Compressing files to save space, Converting images to binary

Back

Large datasets being used without user consent

Front

Which of the following is an example of lossy compression in everyday use?
Options:
Saving a spreadsheet as a CSV file,
Listening to music as an MP3,
Compressing text with ZIP,
Storing a contact list in JSON format

Back

Listening to music as an MP3