AWS-Certified-Solutions-Architect-Professional Free Practice Test

- (Exam Topic 2)
A car rental company has built a serverless REST API to provide data to its mobile app. The app consists of an Amazon API Gateway API with a Regional endpoint, AWS Lambda functions and an Amazon Aurora MySQL Serverless DB cluster The company recently opened the API to mobile apps of partners A significant increase in the number of requests resulted causing sporadic database memory errors Analysis of the API traffic indicates that clients are making multiple HTTP GET requests for the same queries in a short period of time Traffic is concentrated during business hours, with spikes around holidays and other events
The company needs to improve its ability to support the additional usage while minimizing the increase in costs associated with the solution.
Which strategy meets these requirements?

1. A. Convert the API Gateway Regional endpoint to an edge-optimized endpoint Enable caching in the production stage.
2. B. Implement an Amazon ElastiCache for Redis cache to store the results of the database calls Modify the Lambda functions to use the cache
3. C. Modify the Aurora Serverless DB cluster configuration to increase the maximum amount of available memory
4. D. Enable throttling in the API Gateway production stage Set the rate and burst values to limit the incoming calls

Correct Answer: A

- (Exam Topic 2)
A company wants to use AWS to create a business continuity solution in case the company's main on-premises application fails. The application runs on physical servers that also run other applications. The on-premises application that the company is planning to migrate uses a MySQL database as a data store. All the company's on-premises applications use operating systems that are compatible with Amazon EC2.
Which solution will achieve the company's goal with the LEAST operational overhead?

1. A. Install the AWS Replication Agent on the source servers, including the MySQL server
2. B. Set up replication for all server
3. C. Launch test instances for regular drill
4. D. Cut over to the test instances to fail over the workload in the case of a failure event.
5. E. Install the AWS Replication Agent on the source servers, including the MySQL server
6. F. Initialize AWS Elastic Disaster Recovery in the target AWS Regio
7. G. Define the launch setting
8. H. Frequently perform failover and fallback from the most recent point in time.
9. I. Create AWS Database Migration Service (AWS DMS) replication servers and a target Amazon Aurora MySQL DB cluster to host the databas
10. J. Create a DMS replication task to copy the existing data to the target DB cluste
11. K. Create a local AWS Schema Conversion Tool (AWS SCT) change data capture(CDC) task to keep the data synchronize
12. L. Install the rest of the software on EC2 instances by starting with a compatible base AMI.
13. M. Deploy an AWS Storage Gateway Volume Gateway on premise
14. N. Mount volumes on all on-premises server
15. O. Install the application and the MySQL database on the new volume
16. P. Take regular snapshot
17. Q. Install all the software on EC2 Instances by starting with a compatible base AM
18. R. Launch a Volume Gateway on an EC2 instanc
19. S. Restore the volumes from the latest snapsho
20. T. Mount the new volumes on the EC2 instances in the case of a failure event.

Correct Answer: C

- (Exam Topic 2)
An auction website enables users to bid on collectible items The auction rules require that each bid is processed only once and in the order it was received The current implementation is based on a fleet of Amazon EC2 web servers that write bid records into Amazon Kinesis Data Streams A single 12 large instance has a cron job that runs the bid processor, which reads incoming bids from Kinesis Data Streams and processes each bid The auction site is growing in popularity, but users are complaining that some bids are not registering
Troubleshooting indicates that the bid processor is too slow during peak demand hours sometimes crashes while processing and occasionally loses track of which record is being processed
What changes should make the bid processing more reliable?

1. A. Refactor the web application to use the Amazon Kinesis Producer Library (KPL) when posting bids to Kinesis Data Streams Refactor the bid processor to flag each record in Kinesis Data Streams as being unread processing and processed At the start of each bid processing run; scan Kinesis Data Streams for unprocessed records
2. B. Refactor the web application to post each incoming bid to an Amazon SNS topic in place of Kinesis Data Streams Configure the SNS topic to trigger an AWS Lambda function that
3. C. processes each bid as soon as a user submits it
4. D. Refactor the web application to post each incoming bid to an Amazon SQS FIFO queue in place of Kinesis Data Streams Refactor the bid processor to continuously consume the SQS queue Place the bid processing EC2 instance in an Auto Scaling group with a minimum and a maximum size of 1
5. E. Switch the EC2 instance type from t2 large to a larger general compute instance type Put the bid processor EC2 instances in an Auto Scaling group that scales out the number of EC2 instances running the bid processor based on the incomingRecords metric in Kinesis Data Streams

Correct Answer: C
https://aws.amazon.com/sqs/faqs/#:~:text=A single Amazon SQS message,20,000 for%2

- (Exam Topic 1)
A security engineer determined that an existing application retrieves credentials to an Amazon RDS for MySQL database from an encrypted file in Amazon S3. For the next version of the application, the security engineer wants to implement the following application design changes to improve security:
The database must use strong, randomly generated passwords stored in a secure AWS managed service.
The application resources must be deployed through AWS CloudFormation.
The application must rotate credentials for the database every 90 days.
A solutions architect will generate a CloudFormation template to deploy the application.
Which resources specified in the CloudFormation template will meet the security engineer's requirements with the LEAST amount of operational overhead?

1. A. Generate the database password as a secret resource using AWS Secrets Manage
2. B. Create an AWS Lambda function resource to rotate the database passwor
3. C. Specify a Secrets Manager RotationSchedule resource to rotate the database password every 90 days.
4. D. Generate the database password as a SecureString parameter type using AWS Systems Manager Parameter Stor
5. E. Create an AWS Lambda function resource to rotate the database passwor
6. F. Specify a Parameter Store RotationSchedule resource to rotate the database password every 90 days.
7. G. Generate the database password as a secret resource using AWS Secrets Manage
8. H. Create an AWS Lambda function resource to rotate the database passwor
9. I. Create an Amazon EventBridge scheduled rule resource to trigger the Lambda function password rotation every 90 days.
10. J. Generate the database password as a SecureString parameter type using AWS Systems Manager Parameter Stor
11. K. Specify an AWS AppSync DataSource resource to automatically rotate the database password every 90 days.

Correct Answer: A
https://aws.amazon.com/blogs/security/how-to-securely-provide-database-credentials-to-lambda-functions-by-us https://docs.aws.amazon.com/secretsmanager/latest/userguide/rotating-secrets.html https://docs.aws.amazon.com/secretsmanager/latest/userguide/integrating_cloudformation.html

- (Exam Topic 2)
A company runs many workloads on AWS and uses AWS Organizations to manage its accounts. The workloads are hosted on Amazon EC2, AWS Fargate, and AWS Lambda. Some of the workloads have unpredictable demand. Accounts record high usage in some months and low usage in other months.
The company wants to optimize its compute costs over the next 3 years. A solutions architect obtains a 6-month average for each of the accounts across the organization to calculate usage.
Which solution will provide the MOST cost savings for all the organization's compute usage?

1. A. Purchase Reserved Instances for the organization to match the size and number of the most common EC2 instances from the member accounts.
2. B. Purchase a Compute Savings Plan for the organization from the management account by using the recommendation at the management account level.
3. C. Purchase Reserved Instances for each member account that had high EC2 usage according to the data from the last 6 months.
4. D. Purchase an EC2 Instance Savings Plan for each member account from the management account based on EC2 usage data from the last 6 months.

Correct Answer: A