AP CSP Practice — Part 1 of 4

A programmer notices that the same block of code calculating tax is repeated in 4 different parts of a program. Which of the following best describes how the programmer should improve the code?

• Add comments throughout the program to document the duplicated code.
• Replace the four duplicated blocks with a single procedure called from each location.
• Convert all variables in the block to global variables.
• Combine the four blocks into a single long block of sequential statements.

Which of the following BEST describes the difference between a syntax error and a logic error?

• Syntax errors prevent a program from running; logic errors allow it to run but produce incorrect results.
• Syntax errors occur when the user enters bad input; logic errors are caused by the programmer.
• Syntax errors only occur in compiled languages; logic errors only occur in interpreted languages.
• Syntax errors are caused by hardware failures; logic errors are caused by software bugs.

A team of developers is creating a fitness tracking app. They release an early version to a small group of users to gather feedback before adding more features. This practice is best described as which of the following?

• Documentation
• Iterative development
• Procedural abstraction
• Crowdsourcing

Which of the following is the MOST important reason for a development team to include people from diverse backgrounds?

• Diverse teams can complete tasks faster because more people are working.
• Diverse teams are more likely to identify needs and biases that affect different user groups.
• Diverse teams reduce the need for testing because more people verify the code.
• Diverse teams eliminate the need for documentation.

• It doubles.
• It is squared.

A music producer wants to compress an audio file. Quality must be preserved exactly — every sample must be reproducible from the compressed file. Which compression should they use?

• Lossy compression, because it produces smaller files.
• Lossless compression, because it allows perfect reconstruction of the original data.
• Either, because both can perfectly reconstruct the original data.
• Neither — audio files cannot be compressed.

Which of the following file types typically uses LOSSY compression?

• ZIP archive
• JPEG image
• TXT text file
• PNG image