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Match each event source with a typical function it triggers.
List I
A. HTTP gateway
B. Object storage
C. Message queue
D. Timer
List II
1. consuming work items asynchronously
2. handling an interactive API request
3. running a scheduled maintenance task
4. processing a newly uploaded file

  • A.A-4, B-2, C-1, D-3
  • B.A-2, B-4, C-3, D-1
  • C.A-3, B-1, C-4, D-2
  • D.A-2, B-4, C-1, D-3

Answer: D

The same function runtime serves all four, and only the trigger configuration differs. This uniformity is much of the appeal, since one deployment mechanism covers work that would otherwise need several different kinds of server.

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