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AP® Computer Science Principles

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The Land After Time

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APCSP-SK1M72

Computers keep a track of time by counting the number of seconds that have passed since January 1st, 1970, at 12:00:00. We store these numbers in 32-bits. However, on January 19th, 2038, we will run out of bits to express time. Since this would result in negative numbers and cause software to crash and computers to stop running, we need to change computers to a 64-bit system.

Which of the following BEST describes the number of values we can express using a 64-bit system instead of a 32-bit system?

A

2 times as many values can be represented.

B

32 times as many values can be represented.

C

${2}^{32}$ times as many values can be represented.

D

${32}^{2}$ times as many values can be represented.