Q. Which component helps reduce the time taken for shuffling in MapReduce?

  • (A) Combiner
  • (B) Reducer
  • (C) Mapper
  • (D) DataNode
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✅ Correct Answer: (A) Combiner
Explanation: Combiner minimizes data that needs to be shuffled between mapper and reducer by doing local aggregation.

Published by Mr. Dubey ⭐ 111.54K Points at 13-Jun-2025 07:31 am in Hadoop

Explanation by: Mr. Dubey
Combiner minimizes data that needs to be shuffled between mapper and reducer by doing local aggregation.

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