AP Computer Science Principles: Big Idea 2: Data

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Question 2 · Big Idea 2: Data · standard

A sensor must assign a different fixed-length binary identifier to each of 70 locations. All bit patterns may be used, with no reserved codes. What is the minimum number of bits per identifier?A. 6B. 35C. 7D. 70

Question 3 · Big Idea 2: Data · foundation

An archive must recover every character of a text file exactly after compression and decompression. Which statement is justified?A. Any lossy method guarantees exact recovery.B. Compression always makes every possible file smaller.C. Encryption alone guarantees a smaller file.D. A lossless method supports exact recovery, but may not reduce every file's size.

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