SAP-C02 Question 514
Select 4An organization is migrating its multi-tier web application to AWS. The application has a frontend tier, an application tier, and a MySQL database backend. The organization wants to improve scalability, ensure high availability, and optimize costs. Which architectural approaches should the organization adopt to achieve these goals?
- A
Use Amazon RDS Multi-AZ for the MySQL database to ensure high availability.
- B
Deploy the application tier on Amazon EC2 instances in a single Availability Zone to minimize costs.
- C
Implement Auto Scaling groups for the frontend and application tiers to handle varying traffic loads.
- D
Use Amazon S3 for static assets such as images and videos to reduce load on the application servers.
- E
Deploy an Application Load Balancer (ALB) to distribute traffic across the frontend and application tiers.
Show answer and explanation
Correct answers: A, C, D, E
Explanation
To design a scalable, highly available, and cost-optimized architecture, the organization should use Amazon RDS Multi-AZ for database high availability, Auto Scaling groups for dynamic scaling of compute resources, Amazon S3 for storing static assets, and an Application Load Balancer to distribute incoming traffic. Deploying EC2 instances in a single Availability Zone reduces costs but creates a single point of failure, which is not suitable for a highly available architecture.
- A. Correct.
Correct: Amazon RDS Multi-AZ improves high availability for the database by automatically failing over to a standby instance in another Availability Zone during an outage.
- B. Incorrect.
Incorrect: Deploying EC2 instances in a single Availability Zone reduces costs but compromises high availability and resilience to outages.
- C. Correct.
Correct: Auto Scaling groups adjust the number of instances dynamically, ensuring scalability and cost optimization by matching resources to traffic demand.
- D. Correct.
Correct: Amazon S3 is a cost-effective solution for storing static assets, reducing the load and cost associated with serving them from application servers.
- E. Correct.
Correct: An Application Load Balancer (ALB) distributes incoming traffic across multiple targets, ensuring availability and improving fault tolerance.