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Why does AWS charge separately for backup storage in RDS, and how does this affect overall pricing?

hard📝 Conceptual Q10 of 15
AWS - RDS and Relational Databases
Why does AWS charge separately for backup storage in RDS, and how does this affect overall pricing?
ABackup storage is charged only if Multi-AZ is enabled
BBackup storage is charged separately because it uses S3 storage, increasing total cost
CBackup storage cost is included in storage type pricing
DBackup storage is free and included in instance cost
Step-by-Step Solution
Solution:

  1. Step 1: Understand backup storage location

    RDS backups are stored in S3, which incurs separate charges.

  2. Step 2: Pricing implication

    Backup storage cost is separate from instance and storage costs, increasing total cost.

  3. Final Answer:

    Backup storage is charged separately because it uses S3 storage, increasing total cost -> Option B

  4. Quick Check:

    Backup storage = Separate S3 cost [OK]
Quick Trick: Backups use S3 storage, billed separately [OK]
Common Mistakes:
  • Assuming backup storage is free
  • Thinking backup cost included in instance
  • Believing backup cost depends on Multi-AZ only

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