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What is the purpose of checkpointing in a streaming application?

  1. A Persisting state and progress so processing can resume correctly after a failure
  2. B Compressing the stream
  3. C Validating the schema
  4. D Reducing latency
Answer

Persisting state and progress so processing can resume correctly after a failure

Without reliable checkpoints, a restart either reprocesses everything or silently loses events between the last commit and the failure.

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