Q. What does HDFS do when a DataNode fails?

  • (A) Shuts down the system
  • (B) Replaces the DataNode immediately
  • (C) Replicates data blocks from failed node
  • (D) Deletes the associated files
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✅ Correct Answer: (C) Replicates data blocks from failed node
Explanation: HDFS replicates the blocks of the failed DataNode to other healthy DataNodes to maintain replication factor.

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

Explanation by: Mr. Dubey
HDFS replicates the blocks of the failed DataNode to other healthy DataNodes to maintain replication factor.

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