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AWS Certified Developer – Associate Exam (DVA-C02) - AWS Exam Questions
Last updated on June 20, 2026
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1
Question
A company's development team uses an SSH key pair to copy files among a large fleet of development servers. The SSH key pair has been compromised. A developer has generated a replacement key pair. The company has deployed the AWS Systems Manager Agent (SSM Agent) and the Amazon CloudWatch agent on all of the development servers. The developer needs a solution to distribute the new key to all the Linux servers.
Which solution will meet these requirements in the MOST operationally efficient way?
Which solution will meet these requirements in the MOST operationally efficient way?
Options
A
Create an Amazon S3 bucket. Store the public key in the root of the S3 bucket. Create a script to copy the private key from the S3 bucket to the appropriate directory of each server. Use Systems Manager Run Command to run the script on all Linux servers.
B
Create an Amazon S3 bucket. Store the public key in the root of the S3 bucket. Log in to each server. Copy the private key from the S3 bucket to the appropriate directory of each server.
C
Upload the new SSH key pair to AWS Systems Manager Parameter Store. Make each key a new parameter. Grant the team members permissions to download the parameters into the appropriate directory of each server.
D
Upload the new SSH key pair to AWS Secrets Manager as a new secret. Grant the team members permissions to download the secret into the appropriate directory of each server.
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2
Question
A developer needs to migrate an online retail application to AWS to handle an anticipated increase in traffic. The application currently runs on two servers: one server for the web application and another server for the database. The web server renders webpages and manages session state in memory. The database server hosts a MySQL database that contains order details. When traffic to the
application is heavy, the memory usage for the web server approaches 100% and the application
slows down considerably. The developer has found that most of the memory increase and performance decrease is related to the load of managing additional user sessions. For the web server migration, the developer will use Amazon EC2 instances with an Auto Scaling group behind an Application Load Balancer.
Which additional set of changes should the developer make to the application to improve the application's performance?
application is heavy, the memory usage for the web server approaches 100% and the application
slows down considerably. The developer has found that most of the memory increase and performance decrease is related to the load of managing additional user sessions. For the web server migration, the developer will use Amazon EC2 instances with an Auto Scaling group behind an Application Load Balancer.
Which additional set of changes should the developer make to the application to improve the application's performance?
Options
A
Use Amazon ElastiCache for Memcached to store and manage the session data. Use an Amazon RDS for MySQL DB instance to store the application data.
B
Use an EC2 instance to host the MySQL database. Store the session data and the application data in the MySQL database.
C
Use the EC2 instance store to manage the session data. Use an Amazon RDS for MySQL DB instance to store the application data.
D
Use Amazon ElastiCache for Memcached to store and manage the session data and the application data.
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3
Question
A developer has observed an increase in bugs in the AWS Lambda functions that a development team has deployed in its Node.js application. To minimize these bugs, the developer wants to implement automated testing of Lambda functions in an environment that closely simulates the Lambda environment. The developer needs to give other developers the ability to run the tests locally. The developer also needs to integrate the tests into the team's continuous integration and continuous delivery (CI/CD) pipeline before the AWS Cloud Development Kit (AWS CDK) deployment.
Which solution will meet these requirements?
Which solution will meet these requirements?
Options
A
Install a unit testing framework that reproduces the Lambda execution environment. Create sample events based on the Lambda documentation. Invoke the handler function by using a unit testing framework. Check the response. Document how to run the unit testing framework for the other developers on the team. Update the CI/CD pipeline to run the unit testing framework.
B
Create sample events based on the Lambda documentation. Create automated test scripts that use the cdk local invoke command to invoke the Lambda functions. Check the response. Document the test scripts for the other developers on the team. Update the CI/CD pipeline to run the test scripts.
C
Create sample events based on the Lambda documentation. Create a Docker container from the Node.js base image to invoke the Lambda functions. Check the response. Document how to run the
Docker container for the other developers on the team. Update the CllCD pipeline to run the Docker
container.
Docker container for the other developers on the team. Update the CllCD pipeline to run the Docker
container.
D
Install the AWS Serverless Application Model (AWS SAM) CLI tool. Use the sam local generate- event command to generate sample events for the automated tests. Create automated test scripts that use the sam local invoke command to invoke the Lambda functions. Check the response.
Document the test scripts for the other developers on the team. Update the CI/CD pipeline to run the test scripts.
Document the test scripts for the other developers on the team. Update the CI/CD pipeline to run the test scripts.
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4
Question
A developer is designing a serverless application with two AWS Lambda functions to process photos. One Lambda function stores objects in an Amazon S3 bucket and stores the associated metadata in an Amazon DynamoDB table. The other Lambda function fetches the objects from the S3 bucket by using the metadata from the DynamoDB table. Both Lambda functions use the same Python library to perform complex computations and are approaching the quota for the maximum size of zipped deployment packages.
What should the developer do to reduce the size of the Lambda deployment packages with the LEAST operational overhead?
What should the developer do to reduce the size of the Lambda deployment packages with the LEAST operational overhead?
Options
A
Create a Lambda layer with the required Python library. Use the Lambda layer in both Lambda functions.
B
Package each Python library in its own .zip file archive. Deploy each Lambda function with its own
copy of the library.
copy of the library.
C
Download the Python library to an S3 bucket. Program the Lambda functions to reference the object URLs.
D
Combine the two Lambda functions into one Lambda function. Deploy the Lambda function as a single .zip file archive.
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5
Question
An application is processing clickstream data using Amazon Kinesis. The clickstream data feed into Kinesis experiences periodic spikes. The PutRecords API call occasionally fails and the logs show that the failed call returns the response shown below:
Which techniques will help mitigate this exception? (Choose two.)
Which techniques will help mitigate this exception? (Choose two.)
Select 2
Options
A
Use a PutRecord API instead of PutRecords.
B
Implement retries with exponential backoff.
C
Reduce the number of KCL consumers.
D
Reduce the frequency and/or size of the requests.
E
Use Amazon SNS instead of Kinesis.
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