Big Data Systems HPI

Quiz 4 - Stream Processing


Question

Select the true statement about time in stream processing.

  • Event time processing always uses a real-time timestamp.
  • Processing time is not a real-time timestamp.
  • Working with processing time can yield different results than working with event time.
  • Windows require processing time to be triggered.
  • Events always arrive ordered by event time.

Answer

Working with processing time can yield different results than working with event time.

Windows based on processing time can capture other events than ones based on event time, especially if some tuples arrive very late.




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