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AWS Solutions Architect Associate (SAA-C03) Exam Guide

Q: Which AWS architecture makes an application resilient to the failure of an entire data center?

Multi-AZ Deployment.. Availability Zones are physically separate data centers. Deploying across multiple zones ensures the application stays available if one zone fails.

Q: Which AWS service is best suited for asynchronously decoupling two microservices?

Amazon SQS (Simple Queue Service).. SQS stores messages between services, ensuring data is not lost even if the consuming service is temporarily unavailable.

Q: Which S3 storage class is ideal for data accessed less than once a month but requiring immediate retrieval?

S3 Standard-IA (Infrequent Access).. S3 Standard-IA provides lower storage costs but charges for retrieval, while maintaining millisecond latency.

Q: Which tool automatically adjusts the number of EC2 instances based on CPU load?

Auto Scaling.. Auto Scaling monitors applications and automatically adjusts capacity to maintain steady performance at the lowest possible cost.

Q: Which service blocks SQL injection attacks on a web application?

AWS WAF (Web Application Firewall).. WAF allows creating security rules to filter HTTP/S traffic and protect against common web vulnerabilities.

The **AWS Solutions Architect Associate (SAA-C03)** certification is the gold standard for validating Cloud architecture skills. It remains the most sought-after certification by recruiters. It validates your ability to design robust, scalable, and cost-effective distributed solutions on AWS.

Which AWS architecture makes an application resilient to the failure of an entire data center?

Answer : Multi-AZ Deployment.

Availability Zones are physically separate data centers. Deploying across multiple zones ensures the application stays available if one zone fails.

Which AWS service is best suited for asynchronously decoupling two microservices?

Answer : Amazon SQS (Simple Queue Service).

SQS stores messages between services, ensuring data is not lost even if the consuming service is temporarily unavailable.

Which S3 storage class is ideal for data accessed less than once a month but requiring immediate retrieval?

Answer : S3 Standard-IA (Infrequent Access).

S3 Standard-IA provides lower storage costs but charges for retrieval, while maintaining millisecond latency.

Which tool automatically adjusts the number of EC2 instances based on CPU load?

Answer : Auto Scaling.

Auto Scaling monitors applications and automatically adjusts capacity to maintain steady performance at the lowest possible cost.

Which service blocks SQL injection attacks on a web application?

Answer : AWS WAF (Web Application Firewall).

WAF allows creating security rules to filter HTTP/S traffic and protect against common web vulnerabilities.