SAA-C03 Question #110: Real Exam Question with Answer & Explanation

Question

An ecommerce company is migrating its on-premises workload to the AWS Cloud. The workload currently consists of a web application and a backend Microsoft SQL database for storage. The company expects a high volume of customers during a promotional event. The new infrastructure in the AWS Cloud must be highly available and scalable. Which solution will meet these requirements with the LEAST administrative overhead?

Options

• AMigrate the web application to two Amazon EC2 instances across two Availability Zones behind
• BMigrate the web application to an Amazon EC2 instance that runs in an Auto Scaling group
• CMigrate the web application to Amazon EC2 instances that run in an Auto Scaling group across
• DMigrate the web application to three Amazon EC2 instances across three Availability Zones

Explanation

To ensure high availability and scalability, the web application should run in anAuto Scaling groupacross two Availability Zones behind anApplication Load Balancer (ALB). The database should be migrated toAmazon RDSwithMulti-AZ deployment, which ensures fault tolerance and automatic failover in case of an AZ failure. This setup minimizes administrative overhead while meeting the company's requirements for high availability and scalability. Option A: Read replicas are typically used for scaling read operations, and Multi-AZ provides better availability for a transactional database. Option B: Replicating across AWS Regions adds unnecessary complexity for a single web Option D: EC2 instances across three Availability Zones add unnecessary complexity for this

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