Designing Resilient, High-Performance Architectures | AWS Certified Solutions Architect – Associate MCQs

The AWS Certified Solutions Architect – Associate exam tests your ability to design resilient, high-performance architectures. In this section, we’ll focus on key topics like multi-tier architectures, high availability and fault tolerance, disaster recovery strategies, scaling architectures, and decoupling applications. These questions cover practical scenarios to help you sharpen your expertise in building scalable, reliable cloud environments.

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Multi-Tier Architectures – 4 Questions

Q1. A company is designing a web application that will be deployed on Amazon EC2 instances. They require a multi-tier architecture where the web tier and database tier are isolated for security. Which of the following AWS services should be used to architect this solution?

1. Amazon EC2 in a public subnet for the web tier and in a private subnet for the database tier.
2. Amazon S3 for static web hosting and RDS for the database tier.
3. EC2 instances in the same subnet for both the web and database tiers.
4. Amazon Lightsail for both the web and database tiers.
5. AWS Lambda for both the web and database layers.

Q2. A business is looking to architect a multi-tier web application that can automatically scale to handle fluctuating traffic. Which architecture will ensure the web application scales horizontally and remains highly available?

1. Use an Auto Scaling group behind an Elastic Load Balancer (ELB).
2. Use a single EC2 instance with manual scaling.
3. Use AWS Lambda with Amazon API Gateway.
4. Set up a static website on Amazon S3.
5. Use a pre-warmed EC2 instance behind an ELB.

Q3. You need to design a multi-tier architecture for a customer who wants to optimize performance and availability for a high-traffic e-commerce website. Which architecture would be most suitable for this use case?

1. A three-tier architecture with an Application Load Balancer (ALB), EC2 instances, and RDS database.
2. A two-tier architecture with EC2 instances and a NoSQL database.
3. A single-tier architecture with a single EC2 instance running the application and database.
4. A four-tier architecture with EC2 instances, RDS, Redis, and S3.
5. A microservices architecture with AWS Lambda and DynamoDB.

Q4. In a multi-tier application, what is the recommended approach for securing communication between the application and the database layers?

1. Use Amazon VPC with private subnets for the database layer and security groups for both the application and database.
2. Use an API Gateway to route traffic to the database.
3. Use Amazon CloudFront to cache database queries.
4. Use EC2 instances with public IPs for both layers.
5. Use IAM roles to allow EC2 instances to directly access the database.

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High Availability and Fault Tolerance – 4 Questions

Q5. A web application is deployed across two availability zones (AZs). The application uses Amazon RDS for the database layer. How can you ensure high availability in the event of an AZ failure?

1. Enable Multi-AZ deployment for Amazon RDS.
2. Deploy the RDS instance in a single AZ and take regular snapshots.
3. Use Amazon S3 as the data store for the RDS instance.
4. Implement RDS Read Replicas in another region.
5. Set up Amazon CloudFront as a content delivery network.

Q6. An e-commerce platform requires its application to be highly available across different regions. Which architecture ensures minimal downtime and automatic failover in the event of a region failure?

1. Set up Amazon Route 53 with a cross-region failover policy and Multi-AZ RDS.
2. Use EC2 instances with Elastic IPs in each region.
3. Use a single region with Elastic Load Balancing (ELB).
4. Set up AWS Direct Connect between two regions.
5. Use Amazon S3 cross-region replication for application data.

Q7. A healthcare application requires multi-AZ deployment to ensure its database is highly available. Which of the following AWS services supports multi-AZ deployments for high availability?

1. Amazon RDS for MySQL.
2. Amazon S3.
3. Amazon DynamoDB.
4. Amazon Elastic Beanstalk.
5. Amazon EC2 with Auto Scaling.

Q8. A company needs to deploy a stateless web application with high availability and fault tolerance across multiple Availability Zones (AZs). Which AWS service is the best option for this?

1. Use Elastic Load Balancing (ELB) with EC2 instances in multiple AZs.
2. Deploy the application on a single EC2 instance.
3. Use AWS Lambda with Amazon S3.
4. Set up an SQS queue to manage application state.
5. Use an RDS instance in a single AZ for database storage.

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Disaster Recovery Strategies – 4 Questions

Q9. A company wants to implement a disaster recovery (DR) plan that ensures fast recovery times with minimal costs. Which of the following strategies would provide an appropriate balance of recovery time and cost?

1. Pilot Light Strategy.
2. Warm Standby Strategy.
3. Backup and Restore.
4. Active-Active Strategy.
5. Hybrid Cloud.

Q10. Your company needs to implement a disaster recovery strategy with a recovery time objective (RTO) of under one hour and minimal infrastructure running at all times. Which strategy should be used?

1. Warm Standby Strategy.
2. Pilot Light Strategy.
3. Backup and Restore.
4. Active-Active Strategy.
5. Cold Backup.

Q11. A critical application’s backup must be restored quickly to meet compliance requirements. The company prefers to minimize infrastructure costs when the application is not running. Which disaster recovery strategy should be recommended?

1. Backup and Restore.
2. Pilot Light Strategy.
3. Active-Active Strategy.
4. Warm Standby Strategy.
5. Multi-AZ RDS Deployment.

Q12. For a low-cost disaster recovery plan, a company opts for a backup and restore strategy. Which of the following actions should be part of the implementation?

1. Create regular backups and store them in Amazon S3.
2. Deploy a warm standby instance in a different region.
3. Use Amazon CloudFormation to automate disaster recovery.
4. Set up a Cross-Region Replication with Amazon RDS.
5. Create an Elastic Load Balancer with automatic failover.

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Scaling Architectures – 4 Questions

Q13. A company needs to scale its application due to fluctuating traffic. Which scaling strategy will allow automatic increases and decreases in compute capacity based on traffic?

1. Horizontal scaling with EC2 Auto Scaling.
2. Vertical scaling with larger EC2 instances.
3. Horizontal scaling with manual EC2 instance creation.
4. Vertical scaling with a larger database instance.
5. Auto Scaling with Amazon Aurora.

Q14. A company is running an application on EC2 instances behind a load balancer. The load balancer can automatically distribute traffic to multiple instances. Which type of scaling is being used in this architecture?

1. Horizontal scaling.
2. Vertical scaling.
3. Elastic scaling.
4. Dynamic scaling.
5. Auto scaling with Amazon S3.

Q15. You need to design an architecture that can scale out with increased demand. The system must add resources automatically without impacting availability. Which AWS service should you use?

1. EC2 Auto Scaling.
2. AWS Lambda.
3. Amazon CloudWatch.
4. Amazon SQS.
5. Amazon RDS Auto Scaling.

Q16. A company wants to scale its application based on the load without manual intervention. The application must scale both up and down as needed. Which strategy should they implement?

1. Horizontal scaling with EC2 Auto Scaling groups.
2. Vertical scaling by upgrading EC2 instance types.
3. Scaling using Elastic Beanstalk.
4. Scaling with AWS Lambda.
5. Scaling with Amazon SQS.

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Decoupling Applications – 4 Questions

Q17. A web application needs to decouple the user request and payment processing components. Which AWS service would be most suitable for decoupling these components?

1. Amazon SQS.
2. Amazon SNS.
3. Amazon Lambda.
4. Amazon EC2 with an Auto Scaling group.
5. Amazon RDS.

Q18. An application requires decoupling of its front-end web tier and back-end database tier to reduce the coupling and improve reliability. Which of the following should be used? (Choose two)

1. Amazon SQS for asynchronous processing.
2. Amazon SNS for real-time notifications.
3. Amazon API Gateway for RESTful APIs.
4. AWS Lambda for processing requests.
5. Direct connection from the web tier to the database.

Q19. A company needs to implement event-driven architecture that decouples multiple services. Which AWS services would you use? (Choose two)

1. Amazon SNS.
2. Amazon SQS.
3. Amazon EC2.
4. Amazon Kinesis Streams.
5. AWS Direct Connect.

Q20. A company’s application has multiple services that need to communicate asynchronously. Which architecture pattern would be most appropriate for decoupling these services?

1. Message Queue-based Architecture using Amazon SQS.
2. Direct database calls between services.
3. Event-driven architecture using AWS Lambda and SNS.
4. API Gateway for synchronous communication.
5. Microservices with direct connections between services.

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Answers

Qno	Answer (Option with Text)
1	1. Amazon EC2 in a public subnet for the web tier and in a private subnet for the database tier.
2	1. Use an Auto Scaling group behind an Elastic Load Balancer (ELB).
3	1. A three-tier architecture with an Application Load Balancer (ALB), EC2 instances, and RDS database.
4	1. Use Amazon VPC with private subnets for the database layer and security groups for both the application and database.
5	1. Enable Multi-AZ deployment for Amazon RDS.
6	1. Set up Amazon Route 53 with a cross-region failover policy and Multi-AZ RDS.
7	1. Amazon RDS for MySQL.
8	1. Use Elastic Load Balancing (ELB) with EC2 instances in multiple AZs.
9	1. Pilot Light Strategy.
10	1. Warm Standby Strategy.
11	1. Backup and Restore.
12	1. Create regular backups and store them in Amazon S3.
13	1. Horizontal scaling with EC2 Auto Scaling.
14	1. Horizontal scaling.
15	1. EC2 Auto Scaling.
16	1. Horizontal scaling with EC2 Auto Scaling groups.
17	1. Amazon SQS.
18	1. Amazon SQS for asynchronous processing. 3. Amazon API Gateway for RESTful APIs.
19	1. Amazon SNS. 2. Amazon SQS.
20	1. Message Queue-based Architecture using Amazon SQS.