AWS · SAA-C03
High availability and fault tolerance
SAA-C03 · Lesson 11 of 23 · 1:28:56
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In this lesson
Prepare for the SAA-C03 exam (AWS Certified Solutions Architect – Associate). In this lesson: Multi-AZ designs, removing single points of failure, RDS Multi-AZ and Aurora, Route 53 routing policies and failover with health checks, resilient applications with RDS Proxy and retries, and help for legacy applications. Includes three original practice questions.
Preview the topics
- Private servers run in two Availability Zones, but both private route tables send internet traffic to one NAT gateway in zone A. What should the architect change to remove this single point of failure?
- Each user must be served from the Region with the lowest latency, Frankfurt or Virginia, and users must move to the other Region automatically if one fails. Which Route 53 setup fits?
- A legacy inventory application runs on one EC2 instance, its code cannot be changed, and it must recover automatically if the instance fails. What should the architect do?