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DVA-C02 Practice Guide - DVA-C02 Valid Test Discount

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Amazon DVA-C02 (AWS Certified Developer - Associate) exam is a certification program that is designed to test the skills and knowledge of developers who are interested in building and maintaining applications using the Amazon Web Services (AWS) platform. DVA-C02 Exam is intended for individuals who possess a strong understanding of AWS services and have hands-on experience developing and deploying applications on AWS.

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Amazon AWS Certified Developer - Associate Sample Questions (Q629-Q634):

NEW QUESTION # 629
A developer is working on an ecommerce platform that communicates with several third-party payment processing APIs The third-party payment services do not provide a test environment.
The developer needs to validate the ecommerce platform's integration with the third-party payment processing APIs. The developer must test the API integration code without invoking the third-party payment processing APIs.
Which solution will meet these requirements'?

A. Set up an Amazon API Gateway REST API for each third-party API Specify an integration request type of Mock Configure integration responses by using sample responses captured from the real third-party API
B. Create an AWS Lambda function for each third-party API. Embed responses captured from the real third-party API. Configure Amazon Route 53 Resolver with an inbound endpoint for each Lambda function's Amazon Resource Name (ARN).
C. Set up an Amazon API Gateway REST API with a gateway response configured for status code 200 Add response templates that contain sample responses captured from the real third-party API.
D. Set up an AWS AppSync GraphQL API with a data source configured for each third-party API Specify an integration type of Mock Configure integration responses by using sample responses captured from the real third-party API.

Answer: A

Explanation:
* Mocking API Responses: API Gateway's Mock integration type enables simulating API behavior without invoking backend services.
* Testing with Sample Data: Using captured responses from the real third-party API ensures realistic testing of the integration code.
* Focus on Integration Logic: This solution allows the developer to isolate and test the application's interaction with the payment APIs, even without a test environment from the third-party providers.
References:
* Amazon API Gateway Mock Integrations: https://docs.aws.amazon.com/apigateway/latest
/developerguide/how-to-mock-integration.html

NEW QUESTION # 630
A developer is optimizing an AWS Lambda function and wants to test the changes in production on a small percentage of all traffic. The Lambda function serves requests to a REST API in Amazon API Gateway. The developer needs to deploy their changes and perform a test in production without changing the API Gateway URL.
Which solution will meet these requirements?

A. Define a function version for the currently deployed production Lambda function. Update the API Gateway endpoint to reference the new Lambda function version. Upload and publish the optimized Lambda function code. Update the API Gateway endpoint to use the $LATEST version of the Lambda function. Deploy a new API Gateway stage.
B. Define a function version for the currently deployed production Lambda function. Update the API Gateway endpoint to reference the new Lambda function version. Upload and publish the optimized Lambda function code. Update the API Gateway endpoint to use the $LATEST version of the Lambda function. Deploy the API to the production API Gateway stage.
C. Define a function version for the currently deployed production Lambda function. Update the API Gateway endpoint to reference the new Lambda function version. Upload and publish the optimized Lambda function code. On the production API Gateway stage, define a canary release and set the percentage of traffic to direct to the canary release. Update the API Gateway endpoint to use the
$LATEST version of the Lambda function. Publish the API to the canary stage.
D. Define an alias on the $LATEST version of the Lambda function. Update the API Gateway endpoint to reference the new Lambda function alias. Upload and publish the optimized Lambda function code. On the production API Gateway stage, define a canary release and set the percentage of traffic to direct to the canary release. Update the API Gateway endpoint to use the SLAT EST version of the Lambda function. Publish to the canary stage.

Answer: D

Explanation:
* A Lambda alias is a pointer to a specific Lambda function version or another alias1. A Lambda alias allows you to invoke different versions of a function using the same name1. You can also split traffic between two aliases by assigning weights to them1.
* In this scenario, the developer needs to test their changes in production on a small percentage of all traffic without changing the API Gateway URL. To achieve this, the developer can follow these steps:
* Define an alias on the $LATEST version of the Lambda function. This will create a new alias that points to the latest code of the function.
* Update the API Gateway endpoint to reference the new Lambda function alias. This will make the API Gateway invoke the alias instead of a specific version of the function.
* Upload and publish the optimized Lambda function code. This will update the $LATEST version of the function with the new code.
* On the production API Gateway stage, define a canary release and set the percentage of traffic to direct to the canary release. This will enable API Gateway to perform a canary deployment on a new API2. A canary deployment is a software development strategy in which a new version of an API is deployed for testing purposes, and the base version remains deployed as a production release for normal operations on the same stage2. The canary release receives a small percentage of API traffic and the production release takes up the rest2.
* Update the API Gateway endpoint to use the $LATEST version of the Lambda function. This will
* make the canary release invoke the latest code of the function, which contains the optimized changes.
* Publish to the canary stage. This will deploy the changes to a subset of users for testing.
* By using this solution, the developer can test their changes in production on a small percentage of all traffic without changing the API Gateway URL. The developer can also monitor and compare metrics between the canary and production releases, and promote or disable the canary as needed2.

NEW QUESTION # 631
An application uses an Amazon EC2 Auto Scaling group. A developer notices that EC2 instances are taking a long time to become available during scale-out events. The UserData script is taking a long time to run.
The developer must implement a solution to decrease the time that elapses before an EC2 instance becomes available. The solution must make the most recent version ofthe application available at all times and must apply all available security updates. The solution also must minimize the number of images that are created.
The images must be validated.
Which combination of steps should the developer take to meet these requirements? (Choose two.)

A. Set up AWS CodeDeploy to deploy the most recent version of the application at runtime.
B. Use EC2 Image Builder to create an Amazon Machine Image (AMI). Install the latest version of the application and all the patches and agents that are needed to manage and run the application. Update the Auto Scaling group launch configuration to use the AMI.
C. Remove any commands that perform operating system patching from the UserData script.
D. Use EC2 Image Builder to create an Amazon Machine Image (AMI). Install all the patches and agents that are needed to manage and run the application. Update the Auto Scaling group launch configuration to use the AMI.
E. Set up AWS CodePipeline to deploy the most recent version of the application at runtime.

Answer: B,C

Explanation:
AWS CloudFormation is a service that enables developers to model and provision AWS resources using templates. The developer can use the following steps to avoid accidental database deletion in the future:
* Set up AWS CodeDeploy to deploy the most recent version of the application at runtime. This will ensure that the application code is always up to date and does not depend on the AMI.
* Remove any commands that perform operating system patching from the UserData script. This will reduce the time that the UserData script takes to run and speed up the instance launch process.

NEW QUESTION # 632
A developer is creating a microservices application that runs across multiple compute environments. The application must securely access secrets that are stored in AWS Secrets Manager with minimal network latency. The developer wants a solution that reduces the number of direct calls to Secrets Manager and simplifies secrets management across environments.
Which solution will meet these requirements with the LEAST operational overhead?

A. Store the secrets in an Amazon S3 bucket. Retrieve and load the secrets as environment variables during application startup for each compute environment.
B. Create a custom script that retrieves secrets directly from Secrets Manager and caches the secrets in a local database for each compute environment.
C. Implement lazy loading logic in the application to fetch secrets directly from Secrets Manager and to cache the secrets in Redis.
D. Install the Secrets Manager Agent in each compute environment. Configure the agent to cache secrets locally. Securely retrieve the secrets from Secrets Manager as needed.

Answer: D

Explanation:
The Secrets Manager Agent provides an out-of-the-box solution for securely caching secrets locally, reducing latency and operational overhead.
Caching: The agent securely caches secrets locally, minimizing Secrets Manager API calls.
Security: Secrets remain secure during retrieval and storage.
Low Operational Overhead: Managed solution eliminates the need for custom logic.

NEW QUESTION # 633
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?

A. 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.
B. 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.
C. 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.
D. 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.

Answer: C

Explanation:
Amazon S3 is a service that provides highly scalable, durable, and secure object storage. The developer can create an S3 bucket to host the repository and migrate the existing .xml files to the S3 bucket. The developer can update the application code to use the AWS SDK to read and write configuration files from S3. This solution will meet the requirement of high availability for the repository in a cost-effective way.

NEW QUESTION # 634
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