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Why does AWS recommend Multi-AZ deployment over relying solely on backups for high availability?

hard📝 Conceptual Q10 of 15
AWS - RDS and Relational Databases
Why does AWS recommend Multi-AZ deployment over relying solely on backups for high availability?
ABecause backups cannot be restored in another AZ
BBecause backups are more expensive than Multi-AZ
CBecause backups do not provide automatic failover or minimal downtime
DBecause Multi-AZ disables backups
Step-by-Step Solution
Solution:

  1. Step 1: Compare backups and Multi-AZ

    Backups protect data but require manual restore, causing downtime.

  2. Step 2: Understand Multi-AZ advantage

    Multi-AZ provides automatic failover with minimal downtime, unlike backups.

  3. Final Answer:

    Because backups do not provide automatic failover or minimal downtime -> Option C

  4. Quick Check:

    Automatic failover beats manual restore [OK]
Quick Trick: Backups = manual restore; Multi-AZ = automatic failover [OK]
Common Mistakes:
  • Thinking backups are cheaper
  • Believing backups can't restore cross-AZ
  • Assuming Multi-AZ disables backups

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