Q. What happens when a DataNode fails in HDFS?

  • (A) Hadoop stops working
  • (B) NameNode shuts down
  • (C) Data is lost
  • (D) Replica of data is used
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✅ Correct Answer: (D) Replica of data is used
Explanation: HDFS replicates data across multiple DataNodes, so replicas are used in case of failure.

Published by Mr. Dubey ⭐ 111.54K Points at 13-Jun-2025 07:15 am in Hadoop

Explanation by: Mr. Dubey
HDFS replicates data across multiple DataNodes, so replicas are used in case of failure.

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