Q. What is the main responsibility of a DataNode?

  • (A) Store metadata
  • (B) Execute MapReduce jobs
  • (C) Store and retrieve actual data blocks
  • (D) Monitor YARN jobs
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✅ Correct Answer: (C) Store and retrieve actual data blocks
Explanation: DataNodes handle the actual storage and retrieval of data blocks in HDFS.

Published by Mr. Dubey ⭐ 111.54K Points at 13-Jun-2025 07:29 am in Hadoop

Explanation by: Mr. Dubey
DataNodes handle the actual storage and retrieval of data blocks in HDFS.

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