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What is the main purpose of backup in Hadoop's disaster recovery?

easy📝 Conceptual Q11 of 15
Hadoop - Cluster Administration
What is the main purpose of backup in Hadoop's disaster recovery?
ATo delete old data automatically
BTo save copies of data to prevent loss
CTo speed up data processing
DTo encrypt data for security
Step-by-Step Solution
Solution:

  1. Step 1: Understand backup purpose

    Backup means saving copies of data so it can be recovered if lost.

  2. Step 2: Match with options

    Only To save copies of data to prevent loss describes saving copies to prevent data loss.

  3. Final Answer:

    To save copies of data to prevent loss -> Option B

  4. Quick Check:

    Backup = Save copies [OK]
Quick Trick: Backup means saving data copies to avoid loss [OK]
Common Mistakes:
  • Confusing backup with data processing speed
  • Thinking backup deletes data
  • Mixing backup with encryption

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