A

Admin • 833K Points
Coach

Q. What happens if the NameNode fails and there's no backup?

  • (A) Data is permanently lost
  • (B) DataNodes stop working
  • (C) You can restart from the last checkpoint
  • (D) All MapReduce jobs fail but data remains safe
  • Correct Answer - Option(A)
  • Views: 17
  • Filed under category Hadoop
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Explanation by: Admin

NameNode stores metadata; if lost without backup, the entire HDFS becomes unreadable.

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