A streaming dashboard counts events per non-overlapping five-minute period using event time. Devices can send late or duplicate events. Which two choices are needed? Select 2 answers.

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A.Define five-minute tumbling windows and a late-arrival policy
B.Use suitable checkpoints and idempotent output/event handling
C.Use sliding windows while claiming each event belongs to exactly one non-overlapping interval
D.Promise end-to-end exactly-once effects solely because one component has strong delivery semantics

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Define five-minute tumbling windows and a late-arrival policy
Use suitable checkpoints and idempotent output/event handling

Tumbling windows form non-overlapping intervals; late events and replay need explicit correctness policies. Sliding windows are moving intervals. Strong component delivery does not by itself prevent all downstream duplicate business effects. Source guide: PDF page 34.

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