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How does Multi-AZ deployment interact with read replicas in AWS RDS for availability and scalability?

hard📝 Application Q9 of 15
AWS - RDS and Relational Databases
How does Multi-AZ deployment interact with read replicas in AWS RDS for availability and scalability?
AMulti-AZ provides failover; read replicas provide read scalability
BMulti-AZ and read replicas are the same feature
CRead replicas automatically failover like Multi-AZ
DMulti-AZ disables read replicas
Step-by-Step Solution
Solution:

  1. Step 1: Differentiate Multi-AZ and read replicas

    Multi-AZ is for failover and availability; read replicas are for scaling reads.

  2. Step 2: Understand failover behavior

    Read replicas do not automatically failover; Multi-AZ standby does.

  3. Final Answer:

    Multi-AZ provides failover; read replicas provide read scalability -> Option A

  4. Quick Check:

    Failover vs read scaling distinction [OK]
Quick Trick: Multi-AZ = failover; read replicas = read scale [OK]
Common Mistakes:
MISTAKES
  • Thinking Multi-AZ and read replicas are same
  • Assuming read replicas failover automatically
  • Believing Multi-AZ disables read replicas

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