Easily To Pass New DVA-C02 Verified & Correct Answers [Oct 12, 2026 [Q19-Q39]

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Easily To Pass New DVA-C02 Verified & Correct Answers [Oct 12, 2026

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Amazon DVA-C02: AWS Certified Developer – Associate exam is a challenging but rewarding certification exam for developers who want to validate their AWS development skills. AWS Certified Developer – Associate certification can help you differentiate yourself from other developers and open up new career opportunities. With proper preparation and study, you can pass the exam and gain the valuable certification that can help you advance your career as an AWS developer.

QUESTION 19
An Amazon Kinesis Data Firehose delivery stream is receiving customer data that contains personally identifiable information. A developer needs to remove pattern-based customer identifiers from the data and store the modified data in an Amazon S3 bucket.
What should the developer do to meet these requirements?

Implement Kinesis Data Firehose data transformation as an AWS Lambda function. Configure the function to remove the customer identifiers. Set an Amazon S3 bucket as the destination of the delivery stream.

Launch an Amazon EC2 instance. Set the EC2 instance as the destination of the delivery stream. Run an application on the EC2 instance to remove the customer identifiers. Store the transformed data in an Amazon S3 bucket.

Create an Amazon OpenSearch Service instance. Set the OpenSearch Service instance as the destination of the delivery stream. Use search and replace to remove the customer identifiers. Export the data to an Amazon S3 bucket.

Create an AWS Step Functions workflow to remove the customer identifiers. As the last step in the workflow, store the transformed data in an Amazon S3 bucket. Set the workflow as the destination of the delivery stream.

QUESTION 20
A developer is debugging an issue with an application that is based on an AWS Lambda function.
The Lambda function intermittently fails during a 1-hour window. The developer needs to investigate the root cause of the intermittent failures.
The application sends logs to an Amazon CloudWatch Logs log group. The developer must be able to collect logs that relate to Lambda function failures. The developer must capture the dates and times at which the failures occurred.
Which solution will meet these requirements in the MOST operationally efficient way?

Use the AWS CLI in AWS CloudShell to browse the CloudWatch Logs log group to search for the error messages.

Use CloudWatch Insights to run a query on the log group that searches for specific patterns that match the error messages.

Download log flies from the CloudWatch Logs log group to the developer’s local machine. Use a local text search tool to search for the error messages.

Export the CloudWatch Logs log group to an Amazon S3 bucket. Use Amazon Athena to run a SQL query against the bucket to search for the error messages.

QUESTION 21
A developer created several AWS Lambda functions that write data to a single Amazon S3 bucket. The developer configured all the Lambda functions to send logs and metrics to Amazon CloudWatch.
The developer receives reports that one of the Lambda functions writes data to the bucket very slowly. The developer needs to measure the latency between the problematic Lambda function and the S3 bucket.
Which solution will meet this requirement?

Enable AWS X-Ray on the Lambda function. In the generated trace map. select the line between Lambda and Amazon S3.

Query the Lambda function’s log file in Amazon CloudWatch Logs Insights. Return the average of the auto-discovered duration field.

Enable CloudWatch Lambda Insights on the function. View the latency graph that CloudWatch Lambda Insights provides.

Enable AWS X-Ray on the Lambda function. Select Amazon S3 in the latency graph to view the latency histogram.

QUESTION 22
A company has three AWS Lambda functions that are written in Node.js. The Lambda functions include a mix of custom code and open source modules. When bugs are occasionally detected in the open source modules, all three Lambda functions must be patched. What is the MOST operationally efficient solution to deploy a patched open source library for all three Lambda functions?

Create a custom AWS CloudFormation public registry extension. Reference a GitHub repository that hosts the open source modules in the extension.

Create an Amazon CloudFront distribution with an Amazon S3 bucket as the origin. Upload the patched modules to Amazon S3 when needed. Modify each Lambda function to download the patched modules during the cold start.

Launch an Amazon EC2 instance. Host a private open source module registry on the EC2 instance.
Upload the modified open source modules to the private registry. Modify deployment scripts to download from the private registry.

Create a Lambda layer with the open source modules. Modify all three Lambda functions to depend on the layer. Remove the open source modules from each Lambda function. Patch the Lambda layer and update the Lambda functions to reference the new layer version.

QUESTION 23
A developer is working on a web application that runs on Amazon ECS and uses an Amazon DynamoDB table to store data. The application performs a large number of read requests against a small set of the table data.
How can the developer improve the performance of these requests? (Select TWO.)

Create an Amazon ElastiCache cluster. Configure the application to cache data in the cluster.

Create a DynamoDB Accelerator (DAX) cluster. Configure the application to use the DAX cluster for DynamoDB requests.

Configure the application to make strongly consistent read requests against the DynamoDB table.

Increase the read capacity of the DynamoDB table.

Enable DynamoDB adaptive capacity.

QUESTION 24
A company’s developer has deployed an application in AWS by using AWS CloudFormation The CloudFormation stack includes parameters in AWS Systems Manager Parameter Store that the application uses as configuration settings. The application can modify the parameter values When the developer updated the stack to create additional resources with tags, the developer noted that the parameter values were reset and that the values ignored the latest changes made by the application. The developer needs to change the way the company deploys the CloudFormation stack. The developer also needs to avoid resetting the parameter values outside the stack.
Which solution will meet these requirements with the LEAST development effort?

Modify the CloudFormation stack to set the deletion policy to Retain for the Parameter Store parameters.

Create an Amazon DynamoDB table as a resource in the CloudFormation stack to hold configuration data for the application Migrate the parameters that the application is modifying from Parameter Store to the DynamoDB table

Create an Amazon RDS DB instance as a resource in the CloudFormation stack. Create a table in the database for parameter configuration. Migrate the parameters that the application is modifying from Parameter Store to the configuration table

Modify the CloudFormation stack policy to deny updates on Parameter Store parameters

QUESTION 25
A company needs to set up secure database credentials for all its AWS Cloud resources. The company’s resources include Amazon RDS DB instances Amazon DocumentDB clusters and Amazon Aurora DB instances. The company’s security policy mandates that database credentials be encrypted at rest and rotated at a regular interval.
Which solution will meet these requirements MOST securely?

Set up IAM database authentication for token-based access. Generate user tokens to provide centralized access to RDS DB instances. Amazon DocumentDB clusters and Aurora DB instances.

Create parameters for the database credentials in AWS Systems Manager Parameter Store Set the Type parameter to Secure Sting. Set up automatic rotation on the parameters.

Store the database access credentials as an encrypted Amazon S3 object in an S3 bucket Block all public access on the S3 bucket. Use S3 server-side encryption to set up automatic rotation on the encryption key.

Create an AWS Lambda function by using the SecretsManagerRotationTemplate template in the AWS Secrets Manager console. Create secrets for the database credentials in Secrets Manager Set up secrets rotation on a schedule.

QUESTION 26
Users are reporting errors in an application. The application consists of several micro services that are deployed on Amazon Elastic Container Serves (Amazon ECS) with AWS Fargate.
When combination of steps should a developer take to fix the errors? (Select TWO)

Deploy AWS X-Ray as a sidecar container to the micro services. Update the task role policy to allow access to me X -Ray API.

Deploy AWS X-Ray as a daemon set to the Fargate cluster. Update the service role policy to allow access to the X-Ray API.

Instrument the application by using the AWS X-Ray SDK. Update the application to use the Put-XrayTrace API call to communicate with the X-Ray API.

Instrument the application by using the AWS X-Ray SDK. Update the application to communicate with the X-Ray daemon.

Instrument the ECS task to send the stout and spider- output to Amazon CloudWatch Logs. Update the task role policy to allow the cloudwatch Putlogs action.

QUESTION 27
A developer is modifying a large-scale IoT application that stores device telemetry data in an Amazon DynamoDB table. The telemetry data is valuable only for a limited time, but the application stores the data indefinitely. Data storage is slowing the application down. The developer needs a solution to improve the performance of the application.
Which solution will meet this requirement in the MOST operationally efficient way?

Create an AWS Lambda function to run an Amazon EventBridge job on a schedule to scan the DynamoDB table for old items and to delete them.

Archive old data in an Amazon S3 bucket. Set up an S3 Lifecycle policy to transition old data to a more cost-effective storage class.

Set a TTL attribute for the telemetry data. Activate TTL on the DynamoDB table.

Change the table to on-demand capacity mode.

QUESTION 28
A company runs a batch processing application by using AWS Lambda functions and Amazon API Gateway APIs with deployment stages for development, user acceptance testing and production A development team needs to configure the APIs in the deployment stages to connect to third-party service endpoints.
Which solution will meet this requirement?

Store the third-party service endpoints in Lambda layers that correspond to the stage

Store the third-party service endpoints in API Gateway stage variables that correspond to the stage

Encode the third-party service endpoints as query parameters in the API Gateway request URL.

Store the third-party service endpoint for each environment in AWS AppConfig

QUESTION 29
A company’s AWS accounts are in an organization in AWS Organizations. An application in Account A uses environment variables that are stored as parameters in AWS Systems Manager Parameter Store. A developer is creating a new application in Account B that needs to use the same environment variables.
The application in Account B needs access to the parameters in Account A without duplicating the parameters into Account B.
Which solution will meet these requirements with the LEAST operational overhead?

Configure the application in Account B to use credentials for an IAM user in AccountA that has access to the parameters.

Create an assumable IAM role in Account A. Grant the role the permission to access the parameters.

Configure cross-account resource sharing for the parameters by using AWS Resource Access Manager (AWS RAM).

Write a script that stores the parameter values in a private Amazon S3 bucket that both accounts can access.

QUESTION 30
An ecommerce company manages its application’s infrastructure by using AWS Elastic Beanstalk. A developer wants to deploy the new version of the application with the least possible application downtime. The developer also must minimize the application’s rollback time if there are issues with the deployment. Which approach will meet these requirements?

Use a rolling deployment to deploy the new version.

Use a rolling deployment with additional batches to deploy the new version.

Use an all-at-once deployment to deploy the new version.

Deploy the new version to a new environment. Use a blue/green deployment.

QUESTION 31
A company has an application that stores data in Amazon RDS instances. The application periodically experiences surges of high traffic that cause performance problems.
During periods of peak traffic, a developer notices a reduction in query speed in all database queries.
The team’s technical lead determines that a multi-threaded and scalable caching solution should be used to offload the heavy read traffic. The solution needs to improve performance.
Which solution will meet these requirements with the LEAST complexity?

Use Amazon ElastiCache for Memcached to offload read requests from the main database.

Replicate the data to Amazon DynamoDB. Set up a DynamoDB Accelerator (DAX) cluster.

Configure the Amazon RDS instances to use Multi-AZ deployment with one standby instance. Offload read requests from the main database to the standby instance.

Use Amazon ElastiCache for Redis to offload read requests from the main database.

QUESTION 32
A company had an Amazon RDS for MySQL DB instance that was named mysql-db. The DB instance was deleted within the past 90 days. A developer needs to find which 1AM user or role deleted the DB instance in the AWS environment. Which solution will provide this information?

Retrieve the AWS CloudTrail events for the resource mysql-db where the event name is DeleteDBInstance. Inspect each event.

Retrieve the Amazon CloudWatch log events from the most recent log stream within the rds/mysql-db log group. Inspect the log events.

Retrieve the AWS X-Ray trace summaries. Filter by services with the name mysql-db. Inspect the ErrorRootCauses values within each summary.

Retrieve the AWS Systems Manager deletions inventory Filter the inventory by deletions that have a TypeName value of RDS. Inspect the deletion details.

QUESTION 33
A developer wants to insert a record into an Amazon DynamoDB table as soon as a new file is added to an Amazon S3 bucket.
Which set of steps would be necessary to achieve this?

Create an event with Amazon EventBridge that will monitor the S3 bucket and then insert the records into DynamoDB.

Configure an S3 event to invoke an AWS Lambda function that inserts records into DynamoDB.

Create an AWS Lambda function that will poll the S3 bucket and then insert the records into DynamoDB.

Create a cron job that will run at a scheduled time and insert the records into DynamoDB.

QUESTION 34
A developer used the AWS SDK to create an application that aggregates and produces log records for 10 services. The application delivers data to an Amazon Kinesis Data Streams stream.
Each record contains a log message with a service name, creation timestamp, and other log information. The stream has 15 shards in provisioned capacity mode. The stream uses service name as the partition key.
The developer notices that when all the services are producing logs,
ProvisionedThroughputExceededException errors occur during PutRecord requests. The stream metrics show that the write capacity the applications use is below the provisioned capacity.

Change the capacity mode from provisioned to on-demand.

Double the number of shards until the throttling errors stop occurring.

Change the partition key from service name to creation timestamp.

Use a separate Kinesis stream for each service to generate the logs.

QUESTION 35
A developer is using an AWS CodePipeline pipeline to provide continuous integration and continuous delivery (CI/CD) support for a Java application. The developer needs to update the pipeline to support the introduction of a new application dependency .jar file. The pipeline must start a build when a new version of the .jar file becomes available.
Which solution will meet these requirements?

Create an Amazon S3 bucket to store the dependency .jar file. Publish the dependency .jar file to the S3 bucket. Use an Amazon Simple Notification Service (Amazon SNS) notification to start a CodePipeline pipeline build.

Create an Amazon Elastic Container Registry (Amazon ECR) private repository. Publish the dependency .jar file to the repository. Use an ECR source action to start a CodePipeline pipeline build.

Create an Amazon Elastic Container Registry (Amazon ECR) private repository. Publish the dependency .jar file to the repository. Use an Amazon Simple Notification Service (Amazon SNS) notification to start a CodePipeline pipeline build.

Create an AWS CodeArtifact repository. Publish the dependency .jar file to the repository. Use an Amazon EventBridge rule to start a CodePipeline pipeline build.

QUESTION 36
A developer wants to deploy a new version of an AWS Elastic Beanstalk application. During deployment the application must maintain full capacity and avoid service interruption. Additionally, the developer must minimize the cost of additional resources that support the deployment.
Which deployment method should the developer use to meet these requirements?

All at once

Rolling with additional batch

Bluegreen

Immutable

QUESTION 37
A company is building a serverless application on AWS. The application uses an AWS Lambda function to process customer orders 24 hours a day, 7 days a week. The Lambda function calls an external vendor’s HTTP API to process payments.
During load tests, a developer discovers that the external vendor payment processing API occasionally times out and returns errors. The company expects that some payment processing API calls will return errors.
The company wants the support team to receive notifications in near real time only when the payment processing external API error rate exceed 5% of the total number of transactions in an hour. Developers need to use an existing Amazon Simple Notification Service (Amazon SNS) topic that is configured to notify the support team.
Which solution will meet these requirements?

Write the results of payment processing API calls to Amazon CloudWatch. Use Amazon CloudWatch Logs Insights to query the CloudWatch logs. Schedule the Lambda function to check the CloudWatch logs and notify the existing SNS topic.

Publish custom metrics to CloudWatch that record the failures of the external payment processing API calls. Configure a CloudWatch alarm to notify the existing SNS topic when error rate exceeds the specified rate.

Publish the results of the external payment processing API calls to a new Amazon SNS topic.
Subscribe the support team members to the new SNS topic.

Write the results of the external payment processing API calls to Amazon S3. Schedule an Amazon Athena query to run at regular intervals. Configure Athena to send notifications to the existing SNS topic when the error rate exceeds the specified rate.

QUESTION 38
A developer is using an AWS Lambda function to process records that are delivered by an Amazon Kinesis data stream. The developer configured the maximum retry attempts for each record to be 0. If a Lambda function invocation fails, the developer wants to retain the failed record. Which solutions will meet these requirements with the LEAST code changes to the Lambda function? (Choose two.)

Configure an event source mapping for the Lambda function to send failed records to an Amazon SQS queue.

Create a second Lambda function to store failed records in an Amazon DynamoDB table.
Configure the processing Lambda function to invoke the second Lambda function.

Configure the Lambda function to retry failed invocations for a defined count. Integrate the Lambda function with Amazon DynamoDB. Store failed records in a DynamoDB table.

Configure an event source mapping for the Lambda function to send failed records to an Amazon SNS topic.

Increase the data retention period for the Kinesis data stream.

QUESTION 39
A developer is writing an application that will process data delivered into an Amazon S3 bucket. The data is delivered approximately 10 times a day, and the developer expects the data will be processed in less than 1 minute, on average. How can the developer deploy and invoke the application with the lowest cost and lowest latency?

Deploy the application as an AWS Lambda function and invoke it with an Amazon CloudWatch alarm triggered by an S3 object upload.

Deploy the application as an AWS Lambda function and invoke it with an S3 event notification.

Deploy the application as an AWS Lambda function and invoke it with an Amazon CloudWatch scheduled event.

Deploy the application onto an Amazon EC2 instance and have it poll the S3 bucket for new objects.

The Amazon DVA-C02 exam consists of 65 multiple-choice and multiple-response questions, which must be completed within 130 minutes. To pass the exam, candidates must score a minimum of 720 out of a possible 1000 points. DVA-C02 exam fee is $150 USD, and it can be taken online or at a testing center.

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