AWS-Solution-Architect-Associate Free Practice Test

- (Topic 2)
A gaming company has a web application that displays scores. The application runs on Amazon EC2 instances behind an Application Load Balancer. The application stores data in an Amazon RDS for MySQL database. Users are starting to experience long delays and interruptions that are caused by database read performance. The company wants to improve the user experience while minimizing changes to the application's architecture.
What should a solutions architect do to meet these requirements?

1. A. Use Amazon ElastiCache in front of the database.
2. B. Use RDS Proxy between the application and the database.
3. C. Migrate the application from EC2 instances to AWS Lambda.
4. D. Migrate the database from Amazon RDS for MySQL to Amazon DynamoDB.

Correct Answer: A
ElastiCache can help speed up the read performance of the database by caching frequently accessed data, reducing latency and allowing the application to access the data more quickly. This solution requires minimal modifications to the current architecture, as ElastiCache can be used in conjunction with the existing Amazon RDS for MySQL database.

- (Topic 4)
A company is developing a mobile game that streams score updates to a backend processor and then posts results on a leaderboard A solutions architect needs to design a solution that can handle large traffic spikes process the mobile game updates in order of receipt, and store the processed updates in a highly available database The company also wants to minimize the management overhead required to maintain the solution
What should the solutions architect do to meet these requirements?

1. A. Push score updates to Amazon Kinesis Data Streams Process the updates in Kinesis Data Streams with AWS Lambda Store the processed updates in Amazon DynamoDB.
2. B. Push score updates to Amazon Kinesis Data Stream
3. C. Process the updates with a fleet of Amazon EC2 instances set up for Auto Scaling Store the processed updates in Amazon Redshift.
4. D. Push score updates to an Amazon Simple Notification Service (Amazon SNS) topic Subscribe an AWS Lambda function to the SNS topic to process the update
5. E. Store the processed updates in a SQL database running on Amazon EC2.
6. F. Push score updates to an Amazon Simple Queue Service (Amazon SQS) queu
7. G. Use a fleet of Amazon EC2 instances with Auto Scaling to process the updates in the SQS queu
8. H. Store the processed updates in an Amazon RDS Multi-AZ DB instance.

Correct Answer: A
Amazon Kinesis Data Streams is a scalable and reliable service that can ingest, buffer, and process streaming data in real-time. It can handle large traffic spikes and preserve the order of the incoming data records. AWS Lambda is a serverless compute service that can process the data streams from Kinesis Data Streams without requiring any infrastructure management. It can also scale automatically to match the throughput of the data stream. Amazon DynamoDB is a fully managed, highly available,
and fast NoSQL database that can store the processed updates from Lambda. It can also handle high write throughput and provide consistent performance. By using these services, the solutions architect can design a solution that meets the requirements of the company with the least operational overhead.

- (Topic 2)
A company uses a popular content management system (CMS) for its corporate website. However, the required patching and maintenance are burdensome. The company is redesigning its website and wants anew solution. The website will be updated four times a year and does not need to have any dynamic content available. The solution must provide high scalability and enhanced security.
Which combination of changes will meet these requirements with the LEAST operational overhead? (Choose two.)

1. A. Deploy an AWS WAF web ACL in front of the website to provide HTTPS functionality
2. B. Create and deploy an AWS Lambda function to manage and serve the website content
3. C. Create the new website and an Amazon S3 bucket Deploy the website on the S3 bucket with static website hosting enabled
4. D. Create the new websit
5. E. Deploy the website by using an Auto Scaling group of Amazon EC2 instances behind an Application Load Balancer.

Correct Answer: AD
A -> We can configure CloudFront to require HTTPS from clients (enhanced security) https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/using- https-viewers-to-cloudfront.html D -> storing static website on S3 provides scalability and less operational overhead, then configuration of Application LB and EC2 instances (hence E is out)

- (Topic 3)
A meteorological startup company has a custom web application to sell weather data to its users online. The company uses Amazon DynamoDB to store is data and wants to bu4d a new service that sends an alert to the managers of four Internal teams every time a new weather event is recorded. The company does not want true new service to affect the performance of the current application
What should a solutions architect do to meet these requirement with the LEAST amount of operational overhead?

1. A. Use DynamoDB transactions to write new event data to the table Configure the transactions to notify internal teams.
2. B. Have the current application publish a message to four Amazon Simple Notification Service (Amazon SNS) topic
3. C. Have each team subscribe to one topic.
4. D. Enable Amazon DynamoDB Streams on the tabl
5. E. Use triggers to write to a mingle Amazon Simple Notification Service (Amazon SNS) topic to which the teams can subscribe.
6. F. Add a custom attribute to each record to flag new item
7. G. Write a cron job that scans the table every minute for items that are new and notifies an Amazon Simple Queue Service (Amazon SOS) queue to which the teams can subscribe.

Correct Answer: C
The best solution to meet these requirements with the least amount of operational overhead is to enable Amazon DynamoDB Streams on the table and use triggers to write to a single Amazon Simple Notification Service (Amazon SNS) topic to which the teams can subscribe. This solution requires minimal configuration and infrastructure setup, and Amazon DynamoDB Streams provide a low-latency way to capture changes to the DynamoDB table. The triggers automatically capture the changes and publish them to the SNS topic, which notifies the internal teams.

- (Topic 1)
A company runs a photo processing application that needs to frequently upload and download pictures from Amazon S3 buckets that are located in the same AWS Region. A solutions architect has noticed an increased cost in data transfer fees and needs to implement a solution to reduce these costs.
How can the solutions architect meet this requirement?

1. A. Deploy Amazon API Gateway into a public subnet and adjust the route table to route S3 calls through It.
2. B. Deploy a NAT gateway into a public subnet and attach an end point policy that allows access to the S3 buckets.
3. C. Deploy the application Into a public subnet and allow it to route through an internet gateway to access the S3 Buckets
4. D. Deploy an S3 VPC gateway endpoint into the VPC and attach an endpoint policy that allows access to the S3 buckets.

Correct Answer: D
The correct answer is Option D. Deploy an S3 VPC gateway endpoint into the VPC and attach an endpoint policy that allows access to the S3 buckets. By deploying an S3 VPC gateway endpoint, the application can access the S3 buckets over a private network connection within the VPC, eliminating the need for data transfer over the internet. This can help reduce data transfer fees as well as improve the performance of the application. The endpoint policy can be used to specify which S3 buckets the application has access to.