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Question

What are the two common methods used for collecting statistics on the working of the data warehouse?

a.

Sampling methods and event-driven methods

b.

Incremental methods and periodic methods

c.

Real-time methods and historical methods

d.

Predictive methods and reactive methods

Answer: (a).Sampling methods and event-driven methods Explanation:The two common methods for collecting statistics on the working of the data warehouse are sampling methods and event-driven methods. Sampling measures specific aspects at regular intervals, while event-driven methods respond to specific events in the system.

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Q. What are the two common methods used for collecting statistics on the working of the data warehouse?

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