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AWS Certified Developer - Associate DVA-C02
AWS Certified Developer - Associate DVA-C02 Exam

A developer maintains an Amazon API Gateway REST API. Customers use the API through a frontend UI and Amazon Cognito authentication.

The developer has a new version of the API that contains new endpoints and backward-incompatible interface changes. The developer needs to provide beta access to other developers on the team without affecting customers.

Which solution will meet these requirements with the LEAST operational overhead?

  1. Define a development stage on the API Gateway API. Instruct the other developers to point the endpoints to the development stage.
  2. Define a new API Gateway API that points to the new API application code. Instruct the other developers to point the endpoints to the new API.
  3. Implement a query parameter in the API application code that determines which code version to call.
  4. Specify new API Gateway endpoints for the API endpoints that the developer wants to add.

Answer(s): A

Explanation:

The developer should define a development stage on the API Gateway API. They should then instruct the other developers to point the endpoints to the development stage. This solution will meet the requirements with the least operational overhead


Reference:

https://docs.aws.amazon.com/apigateway/latest/developerguide/set-up-stages.html https://docs.aws.amazon.com/apigateway/latest/developerguide/canary-release.html



A developer is creating an application that will store personal health information (PHI). The PHI needs to be encrypted at all times. An encrypted Amazon RDS for MySQL DB instance is storing the data. The developer wants to increase the performance of the application by caching frequently accessed data while adding the ability to sort or rank the cached datasets.

Which solution will meet these requirements?

  1. Create an Amazon ElastiCache for Redis instance. Enable encryption of data in transit and at rest. Store frequently accessed data in the cache.
  2. Create an Amazon ElastiCache for Memcached instance. Enable encryption of data in transit and at rest. Store frequently accessed data in the cache.
  3. Create an Amazon RDS for MySQL read replica. Connect to the read replica by using SSL. Configure the read replica to store frequently accessed data.
  4. Create an Amazon DynamoDB table and a DynamoDB Accelerator (DAX) cluster for the table. Store frequently accessed data in the DynamoDB table.

Answer(s): A

Explanation:

To meet the requirements of caching frequently accessed data while adding the ability to sort or rank cached datasets, a developer should choose Amazon ElastiCache for Redis. ElastiCache is a web service that provides an in-memory data store in the cloud, and it supports both Memcached and Redis engines.
While both engines are suitable for caching frequently accessed data, Redis is a better choice for this use case because it provides sorted sets and other data structures that allow for sorting and ranking of cached datasets. The data in ElastiCache can be encrypted at rest and in transit, ensuring the security of the PHI.


Reference:

https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/elasticache-use-cases.html#elasticache-for-redis-use-cases-gaming https://aws.amazon.com/elasticache/redis-vs-memcached/



A company has a multi-node Windows legacy application that runs on premises. The application uses a network shared folder as a centralized configuration repository to store configuration files in .xml format. The company is migrating the application to Amazon EC2 instances. As part of the migration to AWS, a developer must identify a solution that provides high availability for the repository.

Which solution will meet this requirement MOST cost-effectively?

  1. Mount an Amazon Elastic Block Store (Amazon EBS) volume onto one of the EC2 instances. Deploy a file system on the EBS volume. Use the host operating system to share a folder. Update the application code to read and write configuration files from the shared folder.
  2. Deploy a micro EC2 instance with an instance store volume. Use the host operating system to share a folder. Update the application code to read and write configuration files from the shared folder.
  3. Create an Amazon S3 bucket to host the repository. Migrate the existing .xml files to the S3 bucket. Update the application code to use the AWS SDK to read and write configuration files from Amazon S3.
  4. Create an Amazon S3 bucket to host the repository. Migrate the existing .xml files to the S3 bucket. Mount the S3 bucket to the EC2 instances as a local volume. Update the application code to read and write configuration files from the disk.

Answer(s): C

Explanation:

Option C is the most cost-effective solution to provide high availability for the centralized configuration repository. Amazon S3 provides a highly durable and available object storage service. S3 stores objects redundantly across multiple devices and multiple facilities within a region, making it highly available. The developer can migrate the existing .xml files to an S3 bucket and update the application code to use the AWS SDK to read and write configuration files from Amazon S3.

Option A and B are not the best solutions as they require the developer to use the host operating system to share a folder, which can lead to a single point of failure.

Option D is not a recommended solution as it is not a direct way of accessing an S3 bucket.
While it is possible to use third-party tools to mount an S3 bucket as a local disk, it can lead to performance issues and additional complexity.


Reference:

https://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/AmazonS3.html https://docs.aws.amazon.com/AmazonS3/latest/userguide/UsingAWSSDK.html



A company wants to deploy and maintain static websites on AWS. Each website's source code is hosted in one of several version control systems, including AWS CodeCommit, Bitbucket, and GitHub.

The company wants to implement phased releases by using development, staging, user acceptance testing, and production environments in the AWS Cloud. Deployments to each environment must be started by code merges on the relevant Git branch. The company wants to use HTTPS for all data exchange. The company needs a solution that does not require servers to run continuously.

Which solution will meet these requirements with the LEAST operational overhead?

  1. Host each website by using AWS Amplify with a serverless backend. Conned the repository branches that correspond to each of the desired environments. Start deployments by merging code changes to a desired branch.
  2. Host each website in AWS Elastic Beanstalk with multiple environments. Use the EB CLI to link each repository branch. Integrate AWS CodePipeline to automate deployments from version control code merges.
  3. Host each website in different Amazon S3 buckets for each environment. Configure AWS CodePipeline to pull source code from version control. Add an AWS CodeBuild stage to copy source code to Amazon S3.
  4. Host each website on its own Amazon EC2 instance. Write a custom deployment script to bundle each website's static assets. Copy the assets to Amazon EC2. Set up a workflow to run the script when code is merged.

Answer(s): A

Explanation:

The solution that will meet these requirements with the LEAST operational overhead is option A: Host each website by using AWS Amplify with a serverless backend. AWS Amplify is a fully managed service that allows developers to build and deploy web applications and static websites. With Amplify, developers can easily connect their repositories, such as AWS CodeCommit, Bitbucket, and GitHub, to automatically build and deploy changes to the website based on code merges. Amplify also supports phased releases with multiple environments, including development, staging, user acceptance testing, and production, which can be linked to specific branches in the repository. Additionally, Amplify uses HTTPS for all data exchange by default and has a serverless backend, which means there are no servers to maintain. Overall, this solution provides the least operational overhead while meeting all the specified requirements.


Reference:

https://docs.aws.amazon.com/amplify/latest/userguide/welcome.html




Dan
Ans to 355 is wrong, pls have a certified to work on the answers again pls
- Anonymous
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dnllin
366 Ans Hypervisor-level software patching is wrong, should be B - Customers are responsible for managing their data (including encryption options) Why there are so many wrong answers?
- UNITED STATES
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dnllin
Q342: Which AWS service or feature for technical assistance is available to a user who has the AWS Basic Support plan? - Ans AWS senior support engineers is wrong. Should be D. Basic Support offers support for account and billing questions and service quota increases. The other plans offer a number of technical support cases with pay-by-the-month pricing and no long-term contracts.
- UNITED STATES
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Dnllin
Which AWS services or features enable users to connect on-premises networks to a VPC? (Choose two.) Answer(s): A,D. D (VPC peering) is wrong. C is correct - AWS Direct Connect. Using AWS Direct Connect, you can establish private connectivity between AWS and your datacenter, office,
- UNITED STATES
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Lin Tzu
QUESTION: 154 - answer (D) - Transit gateway is wrong, should be C & E. Below are the components of the site to site VPN: Customer Gateway: A customer gateway is a physical device or software application on your side of the Site-to-Site VPN connection. Virtual Private Gateway: A virtual private gateway is the VPN concentrator on the AWS side of the Site-to-Site VPN connection. You create a virtual private gateway and attach it to the VPC from which you want to create the Site-to-Site VPN connection.
- Anonymous
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saritha
I have passed the exam thankyou
- UNITED STATES
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Tzu Lin
What are the benefits of consolidated billing for AWS Cloud services? (Choose two.) Answer(s): C,E C) One bill for multiple accounts E) Custom cost and usage budget creation E seems incorrect, should be A = Volume discounts (Combined usage – You can combine the usage across all accounts in the organization to share the volume pricing discounts)
- UNITED STATES
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Niraj
Questions are valid. I just passed.
- India
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Sarah
Fantastic effort on the practice exam!
- UNITED STATES
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Marcus
Impressive work on this exam dumps. Love the free version.
- CANADA
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