SAA-C03 Question 168
Select 4A company is hosting a multi-tier web application on AWS. The application runs on Amazon EC2 instances behind an Application Load Balancer (ALB). The database layer is hosted on Amazon RDS. The company wants to ensure that the application can handle high traffic while maintaining efficient resource utilization and cost optimization. Which combination of actions should the Solutions Architect recommend?
- A
Enable Auto Scaling for the EC2 instances behind the ALB.
- B
Enable Multi-AZ deployment for the Amazon RDS database instance.
- C
Use Amazon S3 for serving static content instead of the EC2 instances.
- D
Manually provision EC2 instances to handle peak traffic.
- E
Use Amazon RDS Read Replicas for read-intensive queries.
Show answer and explanation
Correct answers: A, B, C, E
Explanation
To handle high traffic efficiently and ensure cost optimization, the recommended approach is to use Auto Scaling for EC2 instances, enable Multi-AZ for fault tolerance in RDS, offload static content to Amazon S3, and utilize Read Replicas for read-intensive queries. Manually provisioning EC2 instances is not cost-effective or scalable and does not align with AWS best practices.
- A. Correct.
Enabling Auto Scaling for the EC2 instances behind the ALB ensures that the application can handle traffic spikes by scaling out and scale down during low traffic, which optimizes cost.
- B. Correct.
Multi-AZ deployment for Amazon RDS provides high availability and fault tolerance for the database layer, which is critical for maintaining performance during high traffic.
- C. Correct.
Using Amazon S3 for serving static content offloads that workload from the EC2 instances, reducing compute costs and improving scalability.
- D. Incorrect.
Manually provisioning EC2 instances is not a scalable or cost-effective approach to handle peak traffic and is contrary to AWS best practices.
- E. Correct.
Amazon RDS Read Replicas can help offload read-intensive queries, improving performance and scalability of the database layer during high traffic.