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What is the output of this command if a node is down?

medium📝 Predict Output Q13 of 15
Hadoop - Cluster Administration
What is the output of this command if a node is down?
hadoop fsck /
AStatus: HEALTHY
BStatus: UNHEALTHY
CStatus: HEALTHY with missing blocks
DStatus: CORRUPT
Step-by-Step Solution
Solution:

  1. Step 1: Understand fsck output meanings

    HEALTHY means no issues, UNHEALTHY means problems like node down or missing blocks.

  2. Step 2: Node down effect on status

    If a node is down, the system reports UNHEALTHY to indicate reliability issues.

  3. Final Answer:

    Status: UNHEALTHY -> Option B

  4. Quick Check:

    Node down = UNHEALTHY status [OK]
Quick Trick: Node down means UNHEALTHY status [OK]
Common Mistakes:
  • Assuming HEALTHY means no problem
  • Confusing CORRUPT with node down
  • Ignoring missing blocks impact

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