📊 Hadoop
Q. What does the 'combiner' function in MapReduce help with?
  • (A) Combines reducers
  • (B) Combines inputs from HDFS
  • (C) Optimizes performance by reducing data transfer
  • (D) Manages job failures
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✅ Correct Answer: (C) Optimizes performance by reducing data transfer

Explanation: A combiner is an optional MapReduce component that helps optimize performance by reducing the volume of data transferred to the reducer.

Explanation by: Mr. Dubey
A combiner is an optional MapReduce component that helps optimize performance by reducing the volume of data transferred to the reducer.

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