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AWS Certified Developer Training Review Questions

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Questions on how to write code and design scalable applications, implement application security and testing, and on AWS components such as S3, Dynamo DB, Elastic Beanstalk, and CloudFormation.

AWS Certified Developer Training Review Questions

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25 Questions

1. Regarding Amazon SWF, the coordination logic in a workflow is contained in a software program called a

Decider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlCreate a testing branch in AWS CodeCommit to run unit testsCodeDeploy switches the Amazon Route 53 alias records back to the known good green deployment and terminates the failed blue deployment.

2. An application is using a single-node Amazon ElastiCache for Redis instance to improve read performance. Over time, demand for the application has increased exponentially, which has increased the load on the ElastiCache instance. It is critical that this cache layer handles the load and is resilient in case of node failures. What can the Developer do to address the load and resiliency requirements?

Add a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlDecider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlCreate a testing branch in AWS CodeCommit to run unit testsCodeDeploy switches the Amazon Route 53 alias records back to the known good green deployment and terminates the failed blue deployment.

3. A Company runs continuous integration/continuous delivery (CI/CD) pipelines for its application on AWS CodePipeline. A Developer must write unit tests and run them as part of the pipelines before staging the artifacts for testing. How should the Developer incorporate unit tests as part of CI/CD pipelines?

Add a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlDecider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlCodeDeploy switches the Amazon Route 53 alias records back to the known good green deployment and terminates the failed blue deployment.Create a testing branch in AWS CodeCommit to run unit tests

4. A company has implemented AWS CodeDeploy as part of its cloud native CI/CD stack. The company enables automatic rollbacks while deploying a new version of a popular web application from in-place to Amazon EC2. What occurs if the deployment of the new version fails due to code regression?

Create a testing branch in AWS CodeCommit to run unit testsDecider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlCodeDeploy switches the Amazon Route 53 alias records back to the known good green deployment and terminates the failed blue deployment.Add a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.html

5. A company is using continuous integration and continuous delivery systems. A Developer now needs to automate a software package deployment to both Amazon EC2 instances and virtual servers running on- premises. Which AWS service should be used to accomplish this?

Add a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlCreate a testing branch in AWS CodeCommit to run unit testsDecider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlAWS CodeDeploy

6. A user has configured ELB. Which of the below mentioned protocols the user can configure for ELB health checks while setting up ELB?

Decider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.html-TCP -HTTPS -SSL - Ref: http://docs.aws.amazon.com/EIasticLoadBaIancing/latest/Deve|operGuide/Welcome.htmlCreate a testing branch in AWS CodeCommit to run unit tests

7. A Developer implemented a static website hosted in Amazon S3 that makes web service requests hosted in Amazon API Gateway and AWS Lambda. The site is showing an error that reads: “No ‘Access-Control-Allow-Origin’ header is present on the requested resource. Origin ‘null’ is therefore not allowed access.” What should the Developer do to resolve this issue?

Enable cross-origin resource sharing (CORS) for the method in API Gateway - Ref: https://forums.aws.amazon.com/thread.jspa?threadID=252972Decider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlCreate a testing branch in AWS CodeCommit to run unit testsAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.html

8. A Developer is preparing a deployment package using AWS CloudFormation. The package consists of two separate templates: one for the infrastructure and one for the application. The application has to be inside the VPC that is created from the infrastructure template. How can the application stack refer to the VPC created from the infrastructure template?

Use the Ref function to import the VPC into the application stack from the infrastructure template.Add a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlDecider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlCreate a testing branch in AWS CodeCommit to run unit tests

9. A Developer is trying to make API calls using SDK. The IAM user credentials used by the application require multi-factor authentication for all API calls. Which method the Developer use to access the multi-factor authentication protected API?

GetSessionTokenAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlDecider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlCreate a testing branch in AWS CodeCommit to run unit tests

10. When AutoScaIing is launching a new instance based on condition, which of the below mentioned policies will it follow?

Decider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlLaunch an instance in the AZ with the fewest instances - Ref: http://docs.aws.amazon.com/AutoScaIing/latest/Deve|operGuide/AS_Concepts.htmIAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlCreate a testing branch in AWS CodeCommit to run unit tests

11. AutoScaIing is configured with 3 AZs. Each zone has 5 instances running. If AutoScaIing wants to terminate an instance based on the policy action, which instance will it terminate first?

Decider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlRandomly select the instance for termination - Ref: http://docs.aws.amazon.com/AutoScaIing/latest/DeveIoperGuide/us-termination-policy.htmlCreate a testing branch in AWS CodeCommit to run unit testsAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.html

12. A Developer is building a three-tier web application that should be able to handle a minimum of 5000 requests per minute. Requirements state that the web tier should be completely stateless while the application maintains session state for the users. How can session data be externalized, keeping latency at the LOWEST possible value?

Create a testing branch in AWS CodeCommit to run unit testsAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlCreate an Amazon RDS instance, then implement session handling at the application level to leverage a database inside the RDS database instance for session data storage.Decider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.html

13. An Amazon RDS database instance is used by many applications to look up historical data. The query rate is relatively constant. When the historical data is updated each day, the resulting write traffic slows the read query performance and affects all application users. What can be done to eliminate the performance impact on application users?

Decider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlCreate a testing branch in AWS CodeCommit to run unit testsCreate an RDS Read Replica and direct all read traffic to the replica.

14. Can you SSH to your private machines that reside in a VPC from outside without elastic IP?

Yes, but only if you have direct connect or vpn - Ref: http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Scenario2.htmlCreate a testing branch in AWS CodeCommit to run unit testsAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlDecider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.html

15. In regard to DynamoDB, can I delete local secondary indexes?

Decider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlCreate a testing branch in AWS CodeCommit to run unit testsNo - Ref: http://aws.amazon.com/dynamodb/faqs/#security_anchor

16. A developer is planning to use an Amazon API Gateway and AWS Lambda to provide a REST API. The developer will have three distinct environments to manage: development, test, and production. How should the application be deployed while minimizing the number of resources to manage?

Create one API Gateway with multiple stages with one Lambda function with multiple aliases. - Ref: https://aws.amazon.com/blogs/compute/using-api-gateway-stage-variables-to-manage-lambda-functions/Create a testing branch in AWS CodeCommit to run unit testsAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlDecider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.html

17. A Development team would like to migrate their existing application code from a GitHub repository to AWS CodeCommit. What needs to be created before they can migrate a cloned repository to CodeCommit over HTTPS?

A set of Git credentials generated from IAM - Ref: https://docs.aws.amazon.com/codecommit/latest/userguide/how-to-migrate-repository-existing.htmlAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlCreate a testing branch in AWS CodeCommit to run unit testsDecider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.html

18. A Developer wants to build an application that will allow new users to register and create new user accounts. The application must also allow users with social media accounts to log in using their social media credentials. Which AWS service or feature can be used to meet these requirements?

Add a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlDecider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlAmazon Cognito user pools - Ref: https://aws.amazon.com/blogs/apn/how-to-authenticate-users-into-your-apps-using-application-load-balancer-and-centrify/Create a testing branch in AWS CodeCommit to run unit tests

19. A user plans to use RDS as a managed DB platform. Which of the below mentioned features is not supported by RDS?

Create a testing branch in AWS CodeCommit to run unit testsAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlAutomated scaling to manage a higher load - Ref: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Welcome.htmlDecider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.html

20. A user has created an application which sends data to a log file. The server hosting the log files can be unavailable due to any reason. The user wants to make it so that whenever the log server is up it should be receMng the messages. Which of the below mentioned AWS services helps achieve this functionality?

Create a testing branch in AWS CodeCommit to run unit testsAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlDecider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlAWS Simple Queue Service - Ref: http://aws.amazon.com/sqs/

21. A Developer must encrypt a 100-GB object using AWS KMS. What is the BEST approach?

Add a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlDecider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlCreate a testing branch in AWS CodeCommit to run unit testsMake a GenerateDataKeyWithoutPlaintext API call that returns an encrypted copy of a data key. Use an encrypted key to encrypt the data

22. An online gaming site asked you if you can deploy a database that is a fast, highly scalable NoSQL database service in AWS for a new site that he wants to build. Which database should you recommend?

Decider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlCreate a testing branch in AWS CodeCommit to run unit testsAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlAmazon DynamoDB - Ref: https://aws.amazon.com/running_databases/#dynamodb_anchor

23. A user has created a MySQL RDS instance with PIOPS. Which of the below mentioned statements will help user understand the advantage of PIOPS?

Decider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.htmlCreate a testing branch in AWS CodeCommit to run unit testsIt uses optimized EBS volumes and optimized configuration stacks - Ref: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Welcome.htmlAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.html

24. In regard to AWS CIoudFormation, what is a stack?

Create a testing branch in AWS CodeCommit to run unit testsThe set of AWS resources that are created and managed as a single unit - Ref: http://docs.aws.amazon.com/AWSCIoudFormation/latest/UserGuide/concept-stack.htmlAdd a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlDecider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.html

25. A company is running a Docker application on Amazon ECS. The application must scale based on user load in the last 15 seconds. How should a Developer instrument the code so that the requirement can be met?

Add a read replica instance. - Ref: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.htmlCreate a testing branch in AWS CodeCommit to run unit testsCreate a high-resolution custom Amazon CloudWatch metric for user activity data, then publish data every 5 secondsDecider - Ref: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.html

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25 Questions

❤ If you liked Fatskills, consider supporting us by checking out The Life Manuals You Never Got.

About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | OSHA Basics Quiz | What Should We Know? Privacy | Terms |

Without work one finishes nothing. - Ralph Waldo Emerson© 2026 Fatskills.com

All trademarks, logos and brand names are the property of their respective owners. All company, product and service names used in this website are for identification purposes only. Use of these names, trademarks and brands does not imply endorsement.

About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | OSHA Basics Quiz | What Should We Know?
Privacy | Terms |

Without work one finishes nothing. - Ralph Waldo Emerson
© 2026 Fatskills.com