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All of the following are poor fits for function as a service EXCEPT

  • A.a service that needs consistently low latency at all times
  • B.a process that keeps a large model resident in memory
  • C.an image thumbnail generated when a file is uploaded
  • D.a job that must run for several hours without interruption

Answer: C

Correct answer: an image thumbnail generated when a file is uploaded

Thumbnail generation is the archetypal fit: event-driven, short, stateless, independently parallel and idle most of the time. The other three are all poor fits - consistently low latency conflicts with cold starts, a large resident model must be reloaded into each new environment, and a multi-hour job exceeds the execution limit.

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