SAA-C03 Design High-Performing Architectures Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  Enable Multi-AZ deployment for the RDS instance.

  Why it's wrong here

  Multi-AZ deployment is primarily a high availability and disaster recovery feature that provides a standby instance in a different Availability Zone. It does not provide additional read capacity or improve performance for global users, as all read and write operations still target the primary instance.

• ✓

  Create Read Replicas in different AWS Regions.

  Why this is correct

  Creating Read Replicas in regions geographically closer to the users allows the application to redirect read-heavy traffic, such as product catalog browsing, to local replicas. This reduces the round-trip time for database queries, significantly improving the overall responsiveness and performance of the e-commerce application.

• ✗

  Upgrade the RDS instance to a larger instance class.

  Why it's wrong here

  While upgrading the instance class provides more CPU and memory, it does not solve the fundamental problem of network latency for global users. Even with a massive primary instance, users far from the source region will still experience slow response times due to the physical distance.

• ✗

  Enable Enhanced Monitoring with a 1-second granularity.

  Why it's wrong here

  Enhanced Monitoring provides detailed metrics about the operating system and processes on the RDS instance. While useful for troubleshooting and identifying performance bottlenecks, it is a diagnostic tool and does not inherently improve the performance or reduce the latency experienced by the end-users.