AP-Semester Exam

Front

Which of the following best describes how computing devices represent information? A computer will either represent information as bits or bytes but not both, A computer represents data as a byte which is either a 0 or a 1, A computer represents data as bits which is either a 0 or a 1, A computer represents information as bits which contain 8 bytes.

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A computer represents data as bits which is either a 0 or a 1.

Front

Which of the following is NOT true of how computers represent complex information? Computing devices use patterns of bits to represent complex information, Depending on context the same sequence of bits may represent different types of information, Common abstractions that are represented by computing devices include numbers, characters, and color.

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Abstraction helps represent complex information by surfacing complexity that might otherwise be hidden.

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When visiting a museum Lian takes a photo of a painting with a smartphone which stores the photo as an image file. Which of the following best describes the differences between the painting itself and the photo of the painting stored on the smartphone?

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The photo is a digital representation of the analog painting

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Your computer uses 4 bits to represent decimal numbers (0, 1, 2, 3 and so on) in binary. What is the SMALLEST number for which an overflow error occur?

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16

Front

Which of the following is true of how computers represent numbers? Options: Using a fixed but large number of bits can eliminate the possibility of round off error when representing numbers in binary, With a fixed number of bits some numbers are too large to represent in a computer which will lead to overflow errors., Using a fixed but large number of bits, for example 128, eliminates the possibility of overflow errors., With a large but fixed number of bits it is possible to eliminate either round-off errors or overflow errors, but not both.

Back

With a fixed number of bits some numbers are too large to represent in a computer which will lead to overflow errors.

Front

Which of the following best describes the protocols used on the Internet? Options: The protocols of the Internet are designed by government agencies to ensure they remain free to use, The protocols of the Internet are designed by government agencies to ensure they remain free to use, Each device connected to the Internet will use a protocol designed by the company that manufactured it, The protocols of the Internet are open and used by all devices connected to the network

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The protocols of the Internet are designed by government agencies to ensure they remain free to use

Front

Which of the following best describes the purpose of a design specification?
- Tracking errors that arise through user testing
- Documenting comments that will need to be added to a program
- Describing the requirements for how a program will work or users will interact with it
- Listing detailed questions that will be asked of users during interviews

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Describing the requirements for how a program will work or users will interact with it

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Which of the following BEST describes the differences between sequential and event-driven programming? Options: In sequential programming commands run one at a time. In event-driven programming all commands run at the same time. In sequential programming commands run faster than in event-driven programming. In sequential programming each command is run many times in sequence. In event-driven programming all commands are run a single time as an event. In sequential programming commands run in the order they are written. In event-driven programming some commands run in response to user interactions or other events.

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In sequential programming commands run in the order they are written. In event-driven programming some commands run in response to user interactions or other events.

Front

Which of the following is NOT a reason to include comments in programs?
Comments help the computer decide whether certain components of a program are important.
Comments help programmers debug issues in their own code.
Comments help document how code was written for other programmers to use.
Comments enable programmers to track their work throughout the development process.

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Comments help the computer decide whether certain components of a program are important.

Front

What will the “background-color” of the “topButton” be when the program is finished running?

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orange