AWS Certified Developer Associate (DVA-C02): 50 Questions with Answers

Practice the 50 AWS Certified Developer Associate past questions and answers. Our experts have answered the questions, and you will get the correct answers. Prepare yourself for the exam ahead and test your knowledge and readiness.

AWS Certified Developer Association (DVA-C02) Part 3

AWS Certified Developer Association (DVA-C02) Part 3

Questions will be picked at random from the question bank.

You can use the NEXT button to move to the next question, use the PREV button to move to the previous question, the CLEAR button to clear any answer of your choice and you have the FINISH button to end the exam if you choose to.

Any question not answered before the end of the exam time, will be marked as wrong and the exam will end by itself. So try to attempt all questions on time.

Goodluck!

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A Developer needs to deploy an application running on AWS Fargate using
Amazon ECS. The application has environment variables that must be passed to a
container for the application to initialize. How should the environment variables
be passed to the container?

Define an array that includes the environment variables under the entryPoint parameter within the task definition.

Define an array that includes the environment variables under the environment parameter within the task definition.

Define an array that includes the environment variables under the entryPoint parameter within the service definition.

Define an array that includes the environment variables under the environment parameter within the service definition.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A Developer has an application that must accept a large amount of incoming data
streams and process the data before sending it to many downstream users. Which
serverless solution should the Developer use to meet these requirements?

AWS Direct Connect with AWS Lambda.

Amazon EC2 bash script with AWS Lambda.

Amazon Kinesis Data Streams with AWS Lambda.

Amazon RDS MySQL stored procedure with AWS Lambda.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer is provided with an HTTPS clone URL for an AWS CodeCommit
repository. What needs to be configured before cloning this repository?

Generate encryption keys using AWS CloudHSM, then export the key for use with AWS CodeCommit.

Set up the Git credential helper to use an AWS credential profile, and enable the helper to send the path to the repositories

Use AWS KMS to set up public and private keys for use with AWS CodeCommit.

Use AWS Certificate Manager to provision public and private SSL/TLS certificates.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A development team uses AWS Elastic Beanstalk for application deployment. The
team has configured the application version lifecycle policy to limit the number of
application versions to 25. However, even with the lifecycle policy, the source
bundle is deleted from the Amazon S3 source bucket. What should a developer do
in the Elastic Beanstalk application version lifecycle settings to retain the source
code in the S3 bucket?

Disable the Lifecycle policy setting.

Change the Set the application versions limit by total count setting to zero.

Change the Set the application version limit by age setting to zero.

Set Retention to Retain source bundle in S3.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer must ensure that the IAM credentials used by an application in
Amazon EC2 are not misused or compromised. What should the developer use to
keep user credentials secure?

Instance profile credentials.

AWS credentials file.

Command line options.

Environment variables.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A development team is building a new application that will run on Amazon EC2
and use Amazon DynamoDB as a storage layer. The developers all have assigned
IAM user accounts in the same IAM group. The developers currently can launch
EC2 instances, and they need to be able to launch EC2 instances with an instance
role allowing access to Amazon DynamoDB. Which AWS IAM changes are needed
when creating an instance role to provide this functionality?

Create an IAM permission policy attached to the role that allows access to DynamoDB. Add a trust policy to the role that allows DynamoDB to assume the role. Attach a permissions policy to the development group in AWS IAM that allows developers to use the iam:GetRole and iam:PassRole permissions for the role.

Create an IAM permission policy attached to the role that allows access to Amazon EC2. Add a trust policy to the role that allows DynamoDB to assume the role. Attach a permissions policy to the development group in AWS IAM that allows developers to use the iam:PassRole permission for the role.

Create an IAM permissions policy attached to the role that allows access to DynamoDB. Add a trust policy to the role that allows Amazon EC2 to assume the role. Attach a permissions policy to the development group in AWS IAM that allows developers to use the iam:GetRole permission for the role.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A front-end web application is using Amazon Cognito user pools to handle the
user authentication flow. A developer is integrating Amazon DynamoDB into the
application using the AWS SDK for JavaScript. How would the developer securely
call the API without exposing the access or secret keys?

Configure Amazon Cognito identity pools and exchange the JSON Web Token (JWT) for temporary credentials.

Use Amazon Cognito user pool JSON Web Tokens (JWITs) to access the DynamoDB APIs.

Hardcore the credentials, use Amazon S3 to host the web application, and enable server-side encryption.

Run the web application in an Amazon EC2 instance with the instance profile configured.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A Developer has an Amazon DynamoDB table that must be in provisioned mode
to comply with user requirements. The application needs to support the following:
Average item size: 10 KB Item reads each second: 10 strongly consistent Item
writes each second: 2 transactional Which read and write capacity cost-effectively
meets these requirements?

Read 300; write 400

Read 10; write 2

Read 30; write 40

Use on-demand scaling

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A development team is designing a mobile app that requires multi-factor
authentication. Which steps should be taken to achieve this? (Choose TWO)

Use AWS IAM to create IAM users.

Use Amazon Cognito to create a user pool and create users in the user pool.

Enable multi-factor authentication for the Amazon Cognito user pool.

Enable multi-factor authentication for the users created in AWS IAM.

Send multi-factor authentication text codes to users with the Amazon SNS Publish API call in the app code.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

An application running on Amazon EC2 opens connections to an Amazon RDS
SQL Server database. The developer does not want to store the user name and
password for the database in the code. The developer would also like to
automatically rotate the credentials. What is the MOST secure way to store and
access the database credentials?

Create an IAM role that has permissions to access the database. Attach the role to the EC2 instance.

Use AWS Secrets Manager to store the credentials. Retrieve the credentials from Secrets Manager as needed.

Store the credentials in an encrypted text file in an Amazon S3 bucket. Configure the EC2 instance's user data to download the credentials from Amazon S3 as the instance boots.

Store the user name and password credentials directly in the source code. No further action is needed because the source code is stored in a private repository

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer is refactoring a monolithic application. The application takes a POST
request and performs several operations. Some of the operations are in parallel
while others run sequentially. These operations have been refactored into
individual AWS Lambda functions. The POST request will be processed by Amazon
API Gateway. How should the developer invoke the Lambda functions in the same
sequence using API Gateway?

Use an AWS Step Functions state machine to orchestrate the Lambda functions

Use Amazon SNS to trigger the Lambda functions.

Use an AWS Step Functions activity to run the Lambda functions.

Use Amazon SQS to invoke the Lambda functions.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A development team is working on a mobile app that allows users to upload
pictures to Amazon S3. The team expects the app will be used by hundreds of
thousands of users during a single event simultaneously. Once the pictures are
uploaded, the backend service will scan and parse the pictures for inappropriate
content. Which approach is the MOST resilient way to achieve this goal, which also
smooths out temporary volume spikes for the backend service?

Once a picture is uploaded to Amazon S3, publish the event to an Amazon SQS queue. Use the queue as an event source to trigger an AWS Lambda function. In the Lambda function, scan and parse the picture.

When the user uploads a picture, invoke an API hosted in Amazon API Gateway. The API will invoke an AWS Lambda function to scan and parse the picture.

Create a state machine in AWS Step Functions to check the upload folder in the S3 bucket. If a new picture is detected, invoke an AWS Lambda function to scan and parse it.

Develop an AWS Lambda function to check the upload folder in the S3 bucket. If new uploaded pictures are detected, the Lambda function will scan and parse them.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer has built a market application that stores pricing data in Amazon
DynamoDB with Amazon ElastiCache in front. The prices of items in the market
change frequently. Sellers have begun complaining that, after they update the
price of an item, the price does not actually change in the product listing. What
could be causing this issue?

The DynamoDB table was provisioned with insufficient read capacity.

The DynamoDB table was provisioned with insufficient write capacity.

The cache is not being invalidated when the price of the item is changed

The price of the item is being retrieved using a write-through ElastiCache cluster.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A Developer is writing an application that runs on Amazon EC2 instances in an
Auto Scaling group. The application data is stored in an Amazon DynamoDB table
and records are constantly updated by all instances. An instance sometimes
retrieves old data. The Developer wants to correct this by making sure the reads
are strongly consistent. How can the Developer accomplish this?

Set Consistency to strong when calling UpdateTable

Set ConsistentRead to true when calling Getltem.

Use the GetShardIterator command.

Create a new DynamoDB Accelerator (DAX) table.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer added a new feature to an application running on an Amazon EC2
instance that uses Amazon SQS. After deployment, the developer noticed a
significant increase in Amazon SQS costs. When monitoring the Amazon SQS
metrics on Amazon CloudWatch, the developer found that on average one
message per minute is posted on this queue. What can be done to reduce
Amazon SQS costs for this application?

Scale down the Amazon SQS queue to the appropriate size for low traffic demand

Configure push delivery via Amazon SNS instead of polling the Amazon SQS queue.

Increase the Amazon SQS queue polling timeout.

Use an Amazon SQS first-in, first-out (FIFO) queue instead of a standard queue.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

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.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer is using Amazon DynamoDB to store application data. The developer
wants to further improve application performance by reducing response times for
read and write operations. Which DynamoDB feature should be used to meet
these requirements?

Amazon DynamoDB global tables.

Amazon DynamoDB Streams.

Amazon DynamoDB Accelerator.

Amazon DynamoDB transactions.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A company has an application where reading objects from Amazon S3 is based on
the type of user. The user types are registered user and guest user. The company
has 25,000 users and is growing. Information is pulled from an S3 bucket
depending on the user type. Which approaches are recommended to provide
access to both user types? (Choose TWO)

Use the AWS IAM service and let the application assume the different roles using the AWS Security Token Service (AWS STS) AssumeRole action depending on the type of user and provide read access to Amazon S3 using the assumed role.

Use S3 bucket policies to restrict read access to specific IAM users.

Create a new IAM user for each user and grant read access.

Provide a different access key and secret access key in the application code for registered users and guest users to provide read access to the objects.

Use Amazon Cognito to provide access using authenticated and unauthenticated roles.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer is creating an AWS Lambda function that generates a new file each
time it runs. Each new file must be checked into an AWS CodeCommit repository
hosted in the same AWS account. How should the developer accomplish this?

When the Lambda function starts, use the Git CLI to clone the repository. Check the new file into the cloned repository and push the change.

Use an AWS SDK to instantiate a CodeCommit client. Invoke the put_file method to add the file to the repository

After the new file is created in Lambda, use cURL to invoke the CodeCommit API. Send the file to the repository.

Upload the new to an Amazon S3 bucket. Create an AWS Step Function to accept S3 events. In the Step Function, add the new file to the repository.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

An application needs to encrypt data that is written to Amazon S3 where the keys
are managed in an on-premises data center, and the encryption is handled by S3.
Which type of encryption should be used?

Use server-side encryption with customer-provided keys.

Use server-side encryption with AWS KMS-managed keys.

Use client-side encryption with customer master keys.

Use server-side encryption with Amazon S3-managed keys.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer is updating an application deployed on AWS Elastic Beanstalk. The
new version is incompatible with the old version. To successfully deploy the
update, a full cutover to the new, updated version must be performed on all
instances at one time, with the ability to roll back changes in case of a deployment
failure in the new version. How can this be performed with the LEAST amount of
downtime?

Perform an Elastic Beanstalk Rolling with additional batch deployment.

Perform an Elastic Beanstalk Rolling deployment.

Deploy the new version in a new Elastic Beanstalk environment and swap environment URLs.

Use the Elastic Beanstalk All at once deployment policy to update all instances simultaneously

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A Developer is migrating existing applications to AWS. These applications use
MongoDB as their primary data store, and they will be deployed to Amazon EC2
instances. Management requires that the Developer minimize changes to
applications while using AWS services. Which solution should the Developer use to
host MongoDB in AWS?

Replicate the existing MongoDB workload to Amazon DynamoDB.

Install MongoDB on the same instance where the application is running.

Deploy Amazon DocumentDB in MongoDB compatibility mode.

Use Amazon API Gateway to translate API calls from MongoDB to Amazon DynamoDB.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A company requires that AWS Lambda functions written by Developers log errors
so System Administrators can more effectively troubleshoot issues. What should
the Developers implement to meet this need?

Set up an Amazon SNS topic that sends logging statements upon failure.

Create an Amazon CloudWatch Events event trigger based on certain Lambda events.

Publish errors to a dedicated Amazon SQS queue.

Report errors through logging statements in Lambda function code.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

What is required to trace Lambda-based applications with AWS X-Ray?

Send logs from the Lambda application to an S3 bucket; trigger a Lambda function from the bucket to send data to AWS X-Ray.

Use an IAM execution role to give the Lambda function permissions and enable tracing.Update and add AWS X-Ray daemon code to relevant parts of the Lambda function to set up the trace.

Trigger a Lambda function from the application logs in Amazon CloudWatch to submit tracing data to AWS X-Ray.

Update and add AWS X-Ray daemon code to relevant parts of the Lambda function to set up the trace.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer is creating a script to automate the deployment process for a
serverless application. The developer wants to use an existing AWS Serverless
Application Model (AWS SAM) template for the application. What should the
developer use for the project? (Choose TWO)

Call sam package to create the deployment package. Call sam deploy to deploy the package afterward.

Call aws cloudformation package to create the deployment package. Call aws cloudformation deploy to deploy the package afterward.

Create a ZIP package locally and call aws serverlessrepo create-application to create the application.

Create a ZIP package and upload it to Amazon S3. Call aws cloudformation create-stack to create the application.

Call aws s3 cp to upload the AWS SAM template to Amazon S3. Call aws lambda update-function-code to create the application.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A development team wants to run their container workloads on Amazon ECS. Each
application container needs to share data with another container to collect logs
and metrics. What should the developer team do to meet these requirements?

Create two task definitions. Make one to include the application container and the other to include the other container. Mount a shared volume between the two tasks.

Create two pod specifications. Make one to include the application container and the other to include the other container. Link the two pods together.

Create one task definition. Specify both containers in the definition. Mount a shared volume between those two containers.

Create a single pod specification. Include both containers in the specification. Mount a persistent volume to both containers.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer is using AWS CodeDeploy to deploy an application running on
Amazon EC2. The developer wants to change the file permissions for a specific
deployment file. Which lifecycle event should a developer use to meet this
requirement?

BeforeInstall.

AfterInstall.

ValidateService

DownloadBundle.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer converted an existing program to an AWS Lambda function in the
console. The program runs properly on a local laptop, but shows an 'Unable to
import module' error when tested in the Lambda console. Which of the following
can fix the error?

Install the missing module in a lib directory. Create a ZIP file to include all files under the lib directory, and upload the ZIP file as dependency file.

In the Lambda code, invoke a Linux command to install the missing modules under the /usr/lib directory.

In the Lambda console, create a LB_LIBRARY_PATH environment and specify the value for the system library plan.

Install the missing module and specify the current directory as the target. Create a ZIP file to include all files under the current directory, and upload the ZIP file.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

Two containerized microservices are hosted on Amazon EC2 ECS. The first
microservice reads an Amazon RDS Aurora database instance, and the second
microservice reads an Amazon DynamoDB table. How can each microservice be
granted the minimum privileges?

Set ECS_ENABLE_TASK_IAM_ROLE to false on EC2 instance boot in ECS agent configuration file. Run the first microservice with an IAM role for ECS tasks with read-only access for the Aurora database. Run the second microservice with an IAM role for ECS tasks with read-only access to DynamoDB.

Set ECS_ENABLE_TASK_IAM_ROLE to true on EC2 instance boot in the ECS agent configuration file. Grant the instance profile role read-only access to the Aurora database and DynamoDB.

Set ECS_ENABLE_TASK_IAM_ROLE to false on EC2 instance boot in the ECS agent configuration file. Grant the instance profile role read-only access to the Aurora database and DynamoDB.

Set ECS_ENABLE_TASK_IAM_ROLE to true on EC2 instance boot in the ECS agent configuration file. Run the first microservice with an IAM role for ECS tasks with read-only access for the Aurora database. Run the secondmicroservice with an IAM role for ECS tasks with read-only access to DynamoDB.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer is setting up Amazon API Gateway for their company's products. The
API will be used by registered developers to query and update their environments.
The company wants to limit the amount of requests end users can send for both
cost and security reasons. Management wants to offer registered developers the
option of buying larger packages that allow for more requests. How can the
developer accomplish this with the LEAST amount of overhead management?

Enable throttling for the API Gateway stage. Set a value for both the rate and burst capacity. If a registered user chooses a larger package, create a stage for them, adjust the values, and share the new URL with them.

Set up a default usage plan, specify values for the rate and burst capacity, and associate it with a stage. If a registered user chooses a larger package, create a custom plan with the appropriate values and associate the plan with the user.

Enable Amazon CloudWatch metrics for the API Gateway stage. Set up CloudWatch alarms based off the Count metric and the ApiName, Method, Resource, and Stage dimensions to alerts when request rates pass the threshold. Set the alarm action to Deny. If a registered user chooses a larger package, create a user-specific alarm and adjust the values.

Set up Amazon CloudWatch API logging in API Gateway. Create a filter based on the user and requestTime fields and create an alarm on this filter. Write an AWS Lambda function to analyze the values and requester information, and respond accordingly. Set up the function as the target for the alarm. If a registered user chooses a larger package, update the Lambda code with the values.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

An application is experiencing performance issues based on increased demand.
This increased demand is on read-only historical records pulled from an Amazon
RDS-hosted database with custom views and queries. A Developer must improve
performance without changing the database structure. Which approach will
improve performance and MINIMIZE management overhead?

Deploy Memcached on Amazon EC2 and cache the data for the application.

Deploy Amazon DynamoDB, move all the data, and point to DynamoDB.

Deploy Amazon ElastiCache for Redis and cache the data for the application.

Deploy Amazon DynamoDB Accelerator (DAX) on Amazon RDS to improve cache performance.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

An application under development is required to store hundreds of video files. The
data must be encrypted within the application prior to storage, with a unique key
for each video file. How should the Developer code the application?

Use the KMS GenerateDataKey API to get a data key. Encrypt the data with the data key. Store the encrypted data key and data.

Use the KMS Encrypt API to encrypt the data. Store the encrypted data key and data

Upload the data to an S3 bucket using server side-encryption with an AWS KMS key.

Use a cryptography library to generate an encryption key for the application. Use the encryption key to encrypt the data. Store the encrypted data

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A company has developed a new serverless application using AWS Lambda
functions that will be deployed using the AWS Serverless Application Model (AWS
SAM) CLI. Which step should the developer complete prior to deploying the
application?

Compress the application to a .zip file and upload it into AWS Lambda.

Create the application environment using the eb create my-env command.

Bundle the serverless application using a SAM package.

Test the new AWS Lambda function by first tracing it in AWS X-Ray

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A company is managing a NoSQL database on-premises to host a critical
component of an application, which is starting to have scaling issues. The
company wants to migrate the application to Amazon DynamoDB with the
following considerations: Optimize frequent queries. Reduce read latencies. Plan
for frequent queries on certain key attributes of the table. Which solution would
help achieve these objectives?

Create global secondary indexes on keys that are frequently queried. Add the necessary attributes into the indexes

Create DynamoDB global tables to speed up query responses. Use a scan to fetch data from the table.

Create an AWS Auto Scaling policy for the DynamoDB table.

Create local secondary indexes on keys that are frequently queried. DynamoDB will fetch needed attributes from the table.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

An IAM role is attached to an Amazon EC2 instance that explicitly denies access to
all Amazon S3 API actions. The EC2 instance credentials file specifies the IAM
access key and secret access key, which allow full administrative access. Given that
multiple modes of IAM access are present for this EC2 instance, which of the
following is correct?

The EC2 instance will only be able to list the contents of one S3 bucket at a time.

The EC2 instance will be able to perform all actions on any S3 bucket

The EC2 instance will only be able to list the S3 buckets.

The EC2 instance will not be able to perform any S3 action on any S3 bucket.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A company's fleet of Amazon EC2 instances receives data from millions of users
through an API. The servers batch the data, add an object for each user, and
upload the objects to an S3 bucket to ensure high access rates. The object
attributes are Customer ID, Server ID, TS-Server (TimeStamp and Server ID), the
size of the object, and a timestamp. A Developer wants to find all the objects for a
given user collected during a specified time range. After creating an S3 object
created event, how can the Developer achieve this requirement?

Execute an AWS Lambda function in response to the S3 object creation events that creates an Amazon DynamoDB record for every object with the Customer ID as the partition key and TS-Server as the sort key. Retrieve all the records using the Customer ID and TS-Server attributes.

Execute an AWS Lambda function in response to the S3 object creation events that creates an Amazon DynamoDB record for every object with the Customer ID as the partition key and the Server ID as the sort key. Retrieve all the records using the Customer ID and Server ID attributes.

Execute an AWS Lambda function in response to the S3 object creation events that creates an Amazon Redshift record for every object with the Customer ID as the partition key and TS-Server as the sort key. Retrieve all the records using the Customer ID and TS-Server attributes.

Execute an AWS Lambda function in response to the S3 object creation events that creates an Amazon Redshift record for every object with the Customer ID as the partition key and the Server ID as the sort key. Retrieve all the records using the Customer ID and Server ID attributes.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

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?

Vertically scale the ElastiCache instance.

Add a read replica instance.

Migrate to a Memcached cluster

Migrate to an Amazon Elasticsearch Service cluster.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A company is using Amazon API Gateway to manage its public-facing API. The
CISO requires that the APIs be used by test account users only. What is the MOST
secure way to restrict API access to users of this particular AWS account?

API Gateway resource policies.

Cross-origin resource sharing (CORS).

Client-side SSL certificates for authentication.

Usage plans.

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Category: AWS Certified Developer Association (DVA-C02) Part 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?

Create a testing branch in AWS CodeCommit to run unit tests.

Install the AWS CodeDeploy agent on an Amazon EC2 instance to run unit tests.

Create a separate CodePipeline pipeline to run unit tests.

Update the AWS CodeBuild specification to include a phase for running unit tests.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer is testing an application that invokes an AWS Lambda function
asynchronously. During the testing phase, the Lambda function fails to process
after two retries. How can the developer troubleshoot the failure?

Configure Dead Letter Queues by sending events to Amazon SQS for investigatio

Configure AWS CloudTrail logging to investigate the invocation failures.

Configure AWS Config to process any direct unprocessed events.

Configure Amazon Simple Workflow Service to process any direct unprocessed events.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer is building an application using an Amazon API Gateway REST API
backend by an AWS Lambda function that interacts with an Amazon DynamoDB
table. During testing, the developer observes high latency when making requests
to the API. How can the developer evaluate the end-to-end latency and identify
performance bottlenecks?

Enable AWS CloudTrail logging and use the logs to map each latency and bottleneck.

Enable Amazon CloudWatch Logs for the Lambda function. Enable execution logs for API Gateway to view and analyze user request logs.

Enable VPC Flow Logs to capture and analyze network traffic within the VPC.

Enable and configure AWS X-Ray tracing on API Gateway and the Lambda function. Use X-Ray to trace and analyze user requests.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer needs to manage AWS infrastructure as code and must be able to
deploy multiple identical copies of the infrastructure, stage changes, and revert to
previous versions. Which approach addresses these requirements?

Use cost allocation reports and AWS OpsWorks to deploy and manage the infrastructure.

Use AWS Elastic Beanstalk and AWS CodeCommit to deploy and manage the infrastructure.

Use Amazon CloudWatch metrics and alerts along with resource tagging to deploy and manage the infrastructure

Use AWS CloudFormation and AWS CodeCommit to deploy and manage the infrastructure.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A company wants to containerize an existing three-tier web application and
deploy it to Amazon ECS Fargate. The application is using session data to keep
track of user activities. Which approach would provide the BEST user experience?

Enable session stickiness in the existing Network Load Balancer and manage the session data in the container.

Create a session table in Amazon Redshift and save the session data in the database table.

Provision a Redis cluster in Amazon ElastiCache and save the session data in the cluster.

Use an Amazon S3 bucket as data store and save the session data in the bucket.

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Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer is writing a web application that must share secure documents with
end users. The documents are stored in a private Amazon S3 bucket. The
application must allow only authenticated users to download specific documents
when requested, and only for a duration of 15 minutes. How can the developer
meet these requirements?

Use server-side encryption with AWS KMS managed keys (SSE-KMS) and download the documents using HTTPS.

Modify the S3 bucket policy to only allow specific users to download the documents. Revert the change after 15 minutes.

Copy the documents to a separate S3 bucket that has a lifecycle policy for deletion after 15 minutes.

Create a presigned S3 URL using the AWS SDK with an expiration time of 15 minutes.

45 / 50

Category: AWS Certified Developer Association (DVA-C02) Part 3

An ecommerce startup is preparing for an annual sales event. As the traffic to the
company's application increases, the development team wants to be notified when
the Amazon EC2 instance's CPU utilization exceeds 80%. Which solution will meet
this requirement?

Create an AWS Lambda function that queries the AWS CloudTrail logs for the CPUUtilization metric every 15 minutes and sends a notification to an Amazon SNS topic when the CPU utilization exceeds 80%.

Create a cron job on the EC2 instance that executes the –describe-instanceinformation command on the host instance every 15 minutes and sends the results to an Amazon SNS topic.

Create a custom Amazon CloudWatch alarm that sends a notification to an Amazon SNS topic when the CPU utilization exceeds 80%.

Create a custom AWS Cloud Trail alarm that sends a notification to an Amazon SNS topic when the CPU utilization exceeds 80%.

46 / 50

Category: AWS Certified Developer Association (DVA-C02) Part 3

A company is adding stored value (or gift card) capability to its highly popular
casual gaming website. Users need to be able to trade this value for other users'
items on the platform. This would require both users' records be updated as a
single transaction, or both users' records to be completely rolled back. Which AWS
database options can provide the transactional capability required for this new
feature? (Choose TWO)

Amazon DynamoDB with reads and writes made using Transact* operations.

Amazon DynamoDB with operations made with the ConsistentRead parameter set to true.

Amazon Aurora MySQL with operations made within a transaction block.

Amazon Redshift with operations made within a transaction block.

Amazon ElastiCache for Memcached with operations made within a transaction block.

47 / 50

Category: AWS Certified Developer Association (DVA-C02) Part 3

A Developer is investigating an application's performance issues. The application
consists of hundreds of microservices, and a single API call can potentially have a
deep call stack. The Developer must isolate the component that is causing the
issue. Which AWS service or feature should the Developer use to gather
information about what is happening and isolate the fault?

Amazon GuardDuty.

AWS X-Ray

Amazon Macie.

VPC Flow Logs.

48 / 50

Category: AWS Certified Developer Association (DVA-C02) Part 3

A company has 25,000 employees and is growing. The company is creating an
application that will be accessible to its employees only. A developer is using
Amazon S3 to store images and Amazon RDS to store application data. The
company requires that all employee information remain in the legacy Security
Assertion Markup Language (SAML) employee directory only and is not interested
in mirroring any employee information on AWS. How can the developer provide
authorized access for the employees who will be using this application so each
employee can access their own application data only?

Use Amazon Cognito user pools, federate with the SAML provider, and use user pool groups with an IAM policy.

Create a unique IAM role for each employee and have each employee assume the role to access the application so they can access their personal data only

Use an Amazon Cognito identity pool, federate with the SAML provider, and use an IAM condition key with a value for the cognito-identity.amazonaws.com:sub variable to grant access to the employees.

Use Amazon VPC and keep all resources inside the VPC, and use a VPC link for the S3 bucket with the bucket policy

49 / 50

Category: AWS Certified Developer Association (DVA-C02) Part 3

A company is developing a report executed by AWS Step Functions, Amazon
CloudWatch shows errors in the Step Functions task state machine. To
troubleshoot each task, the state input needs to be included along with the error
message in the state output. Which coding practice can preserve both the original
input and the error for the state?

Use OutputPath in a Retry statement and set the value to $

Use Error Equals in a Retry statement to include the error with the original input.

Use InputPath in a Catch statement and set the value to null.

Use ResultPath in a Catch statement to include the error with the original input.

50 / 50

Category: AWS Certified Developer Association (DVA-C02) Part 3

A developer has written an AWS Lambda function using Java as the runtime
environment. The developer wants to isolate a performance bottleneck in the
code. Which steps should be taken to reveal the bottleneck?

Use the AWS X-Ray API to write trace data into X-Ray from strategic places within the code. Use the X-Ray console to analyze the resulting data

Use the Amazon CloudWatch API to write timestamps to a custom CloudWatch metric. Use the AWS X-Ray console to analyze the resulting data.

Use the AWS X-Ray API to write trace data into X-Ray from strategic places within the code. Use the Amazon CloudWatch console to analyze the resulting data.

Use the Amazon CloudWatch API to write timestamps to a custom CloudWatch metric. Use the CloudWatch console to analyze the resulting data.

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50 AWS Certified Developer Associate Questions

AWS Certified Developer Associate (DVA-C02): 50 Questions with Answers

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