Amazon
DVA-C01 Exam
Questions

AWS Certified Developer - Associate DVA-C01

Amazon (DVA-C01) Exam Questions And Answers page 55

How to migrate an application from Classic Load Balancer to Application Load Balancer using AWS Management Console?

Single Choice

A team of Developers must migrate an application running inside an AWS Elastic Beanstalk environment from a Classic Load Balancer to an Application Load Balancer.

Which steps should be taken to accomplish the task using the AWS Management Console?

1. Update the application code in the existing deployment.
2. Select a new load balancer type before running the deployment.
3. Deploy the new version of the application code to the environment.

1. Create a new environment with the same configurations except for the load balancer type.
2. Deploy the same application version as used in the original environment.
3. Run the swap-environment-cnames action.

1. Clone the existing environment, changing the associated load balancer type.
2. Deploy the same application version as used in the original environment.
3. Run the swap-environment-cnames action.

1. Edit the environment definitions in the existing deployment.
2. Change the associated load balancer type according to the requirements.
3. Rebuild the environment with the new load balancer type.

Storage Services Deployment and Management

How can a developer prioritize video processing for paying members on a video-hosting website?

Single Choice

A video-hosting website has two types of members: those who pay a fee, and those who do not. Each video upload places a message in Amazon SQS. A fleet of Amazon EC2 instances polls Amazon SQS and processes each video.

The developer needs to ensure that the videos uploaded by the paying members are processed first.

How can the developer meet this requirement?

Create two SQS queues: one for paying members, and one for non-paying members. Poll the paying member queue first and then poll the non-paying member queue.

Use SQS to set priorities on individual items within a single queue; give the paying members videos the highest priority.

Use SQS to set priorities on individual items within a single queue and use Amazon SNS to encode the videos.

Create two Amazon SNS topics: one for paying members and one for non-paying members. Use SNS topic subscription priorities to differentiate between the two types of members.

Compute Services Storage Services

What should the Developer implement to achieve the design goals for a web application with millions of user sign-ups?

Single Choice

A web application is designed to allow new users to create accounts using their email addresses. The application will store attributes for each user, and is expecting millions of user to sign up.

What should the Developer implement to achieve the design goals?

Amazon Cognito user pools

AWS Mobile Hub user data storage

Amazon Cognito Sync

AWS Mobile Hub cloud logic

Storage Services Database Services

How can a Developer implement encryption at rest for data within Amazon Kinesis Streams?

Single Choice

A web application is using Amazon Kinesis Streams for clickstream data that may not be consumed for up to 12 hours.

How can the Developer implement encryption at rest for data within the Kinesis Streams?

Enable SSL connections to Kinesis

Use Amazon Kinesis Consumer Library

Encrypt the data once it is at rest with a Lambda function

Enable server-side encryption in Kinesis Streams

Developer Tools Monitoring and Troubleshooting

Which caching strategy is most efficient for addressing increasing page load times due to database load?

Single Choice

A website s page load times are gradually increasing as more users access the system at the same time. Analysis indicates that a user profile is being loaded from a database in all the web pages being visited by each user and this is increasing the database load and the page load latency. To address this issue the Developer decides to cache the user profile data.

Which caching strategy will address this situation MOST efficiently?

Create a new Amazon EC2 Instance and run a NoSQL database on it. Cache the profile data within this database using the write-through caching strategy.

Create an Amazon ElastiCache cluster to cache the user profile data. Use a cache-aside caching strategy.

Use a dedicated Amazon RDS instance for caching profile data. Use a write-through caching strategy.

Create an ElastiCache cluster to cache the user profile data. Use a write-through caching strategy.

Database Services Deployment and Management

How can Docker images be pulled to workstations if AWS CLI is already configured?

Single Choice

AWS CodeBuild builds code for an application, creates the Docker image, pushes the image to Amazon Elastic Container Registry (Amazon ECR), and tags the image with a unique identifier.

If the Developers already have AWS CLI configured on their workstations, how can the Docker images be pulled to the workstations?

Run the following:
docker pull REPOSITORY URI : TAG

Run the output of the following:
aws ecr get-login
and then run:
docker pull REPOSITORY URI : TAG

Run the following:
aws ecr get-login
and then run:
docker pull REPOSITORY URI : TAG

Run the output of the following:
aws ecr get-download-url-for-layer
and then run:
docker pull REPOSITORY URI : TAG

Developer Tools Deployment and Management

How can a Developer optimize a full Amazon DynamoDB table scan during non-peak hours without affecting normal workloads?

Single Choice

During non-peak hours, a Developer wants to minimize the execution time of a full Amazon DynamoDB table scan without affecting normal workloads. The workloads average half of the strongly consistent read capacity units during non-peak hours.

How would the Developer optimize this scan?

Use parallel scans while limiting the rate

Use sequential scans

Increase read capacity units during the scan operation

Change consistency to eventually consistent during the scan operation

Networking and Content Delivery Developer Tools

How can a Developer optimize a full Amazon DynamoDB table scan during non-peak hours without affecting normal workloads?

Single Choice

Use parallel scans while limiting the rate

Use sequential scans

Increase read capacity units during the scan operation

Change consistency to eventually consistent during the scan operation

Networking and Content Delivery Developer Tools

What is the run order of hooks for in-place deployments in AWS CodeDeploy?

Single Choice

For a deployment using AWS CodeDeploy, what is the run order of the hooks for in-place deployments?

Before Install -> Application Stop -> Application Start -> After Install

Application Stop -> Before Install -> After Install -> Application Start

Before Install -> Application Stop -> Validate Service -> Application Start

Application Stop -> Before Install -> Validate Service -> Application Start

Deployment and Management

What is the most efficient way to reference a new Amazon S3 bucket in another CloudFormation template?

Single Choice

Given the following AWS CloudFormation template:

What is the MOST efficient way to reference the new Amazon S3 bucket from another AWS CloudFormation template?

Add an Export declaration to the Outputs section of the original template and use ImportValue in other templates.

Add Exported: true to the ContentBucket in the original template and use ImportResource in other templates.

Create a custom AWS CloudFormation resource that gets the bucket name from the ContentBucket resource of the first stack.

Use Fn::Include to include the existing template in other templates and use the ContentBucket resource directly.

Storage Services Deployment and Management

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Amazon (DVA-C01) Exam Questions And Answers page 55

How to migrate an application from Classic Load Balancer to Application Load Balancer using AWS Management Console?

Comments

How can a developer prioritize video processing for paying members on a video-hosting website?

Comments

What should the Developer implement to achieve the design goals for a web application with millions of user sign-ups?

Correct Answer:

References:

Comments

How can a Developer implement encryption at rest for data within Amazon Kinesis Streams?

Correct Answer:

References:

Comments

Which caching strategy is most efficient for addressing increasing page load times due to database load?

Comments

How can Docker images be pulled to workstations if AWS CLI is already configured?

Comments

How can a Developer optimize a full Amazon DynamoDB table scan during non-peak hours without affecting normal workloads?

Comments

How can a Developer optimize a full Amazon DynamoDB table scan during non-peak hours without affecting normal workloads?

Comments

What is the run order of hooks for in-place deployments in AWS CodeDeploy?

Correct Answer:

References:

Comments

What is the most efficient way to reference a new Amazon S3 bucket in another CloudFormation template?

Comments

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