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An orchestration service for functions is used chiefly to

  • A.reduce the cold start time of each function invoked
  • B.lower the per-invocation price of the functions used
  • C.allow a single function to run past its own timeout
  • D.coordinate a multi-step workflow with state and retries

Answer: D

Chaining functions by having each invoke the next leaves nowhere to keep progress and no sensible place to retry. An orchestrator holds the state of the workflow outside the functions and handles failure between steps.

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