Multiple choice technology web technology

Aggregation provides OLAP with __________

  1. Multidimensional data.

  2. Pre-calculated data.

  3. Nested data.

  4. Slow data retrieval.

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B Correct answer
Explanation

Aggregation pre-calculates summary data (sums, averages, counts) at different dimensional levels, storing these results for faster query performance. OLAP systems rely heavily on pre-aggregated data to avoid computing summaries on the fly for each query. This enables fast response times for analytical queries.

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