Question

What is the purpose of sliding time windows in stream-based query answering?

a.

To define the semantics of stream-based queries appropriately.

b.

To store historical data for future analysis.

c.

To support temporal aggregation operators.

d.

To optimize query plans for continuous queries.

Posted under Big Data Computing

Answer: (a).To define the semantics of stream-based queries appropriately. Explanation:Sliding time windows in stream-based query answering are used to define the semantics of stream-based queries appropriately by limiting the subset of data considered by a query.

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