Question

What is horizontal parallelism in the context of database processing?

a.

Data partitioning across multiple disks

b.

Parallel execution of different tasks in a query

c.

Pipelined execution of subtasks in a query

d.

The decomposition of tasks into subtasks

Posted under Data Warehousing and OLAP

Answer: (b).Parallel execution of different tasks in a query Explanation:Horizontal parallelism involves the parallel execution of different tasks within a query. Each task is processed concurrently, but the tasks within the same query are executed serially by a single server process.

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