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DVA-C02 Exam Dumps - AWS Certified Developer - Associate

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Question # 9

A company is launching a photo sharing application on AWS. Users use the application to upload images to an Amazon S3 bucket. When users upload images, an AWS Lambda function creates thumbnail versions of the images and stores the thumbnail versions in another S3 bucket.

During development, a developer notices that the Lambda function takes more than 2 minutes to complete the thumbnail process. The company needs all images to be processed in less than 30 seconds.

What should the developer do to meet these requirements?

A.

Increase the virtual CPUs (vCPUs) for the Lambda function to use 10 vCPUs.

B.

Change the Lambda function instance type to use m6a.4xlarge.

C.

Configure the Lambda function to increase the amount of memory.

D.

Configure burstable performance for the Lambda function.

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Question # 10

A developer works for a company that only has a single pre-production AWS account with an AWS CloudFormation AWS SAM stack. The developer made changes to an existing AWS Lambda function specified in the AWS SAM template and additional Amazon SNS topics.

The developer wants to do a one-time deployment of the changes to test if the changes are working. The developer does not want to impact the existing pre-production application that is currently being used by other team members as part of the release pipeline.

Which solution will meet these requirements?

A.

Use the AWS SAM CLI to package and deploy the SAM application to the pre-production AWS account. Specify the debug parameter.

B.

Use the AWS SAM CLI to package and create a change set against the pre-production AWS account. Execute the change set in a new AWS account designated for a development environment.

C.

Use the AWS SAM CLI to package and deploy the SAM application to a new AWS account designated for a development environment.

D.

Update the CloudFormation stack in the pre-production account. Add a separate stage that points to a new AWS account designated for a development environment.

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Question # 11

An application that runs on AWS Lambda requires access to specific highly confidential objects in an Amazon S3 bucket. In accordance with the principle of least privilege a company grants access to the S3 bucket by using only temporary credentials.

How can a developer configure access to the S3 bucket in the MOST secure way?

A.

Hardcode the credentials that are required to access the S3 objects in the application code. Use the credentials to access me required S3 objects.

B.

Create a secret access key and access key ID with permission to access the S3 bucket. Store the key and key ID in AWS Secrets Manager. Configure the application to retrieve the Secrets Manager secret and use the credentials to access me S3 objects.

C.

Create a Lambda function execution role Attach a policy to the rote that grants access to specific objects in the S3 bucket.

D.

Create a secret access key and access key ID with permission to access the S3 bucket Store the key and key ID as environment variables m Lambda. Use the environment variables to access the required S3 objects.

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Question # 12

A developer has created a data collection application that uses Amazon API Gateway, AWS Lambda, and Amazon S3. The application ' s users periodically upload data files and wait for the validation status to be reflected on a processing dashboard. The validation process is complex and time-consuming for large files.

Some users are uploading dozens of large files and have to wait and refresh the processing dashboard to see if the files have been validated. The developer must refactor the application to immediately update the validation result on the user’s dashboard without reloading the full dashboard.

What is the MOST operationally efficient solution that meets these requirements?

A.

Integrate the client with an API Gateway WebSocket API. Save the user-uploaded files with the WebSocket connection ID. Push the validation status to the connection ID when the processing is complete to initiate an update of the UI.

B.

Launch an Amazon EC2 micro instance, and set up a WebSocket server. Send the user-uploaded file and user detail to the EC2 instance after the user uploads the file. Use the WebSocket server to send updates to the UI when the uploaded file is processed.

C.

Save the user ' s email address along with the user-uploaded file. When the validation process is complete, send an email notification through Amazon SNS to the user who uploaded the file.

D.

Save the user-uploaded file and user detail to Amazon DynamoDB. Use Amazon DynamoDB Streams with Amazon SNS push notifications to send updates to the browser to update the UI.

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Question # 13

A developer is building a web application that uses Amazon API Gateway to expose an AWS Lambda function to process requests from clients. During testing, the developer notices that the API Gateway times out even though the Lambda function finishes under the set time limit.

Which of the following API Gateway metrics in Amazon CloudWatch can help the developer troubleshoot the issue? (Choose two.)

A.

CacheHitCount

B.

IntegrationLatency

C.

CacheMissCount

D.

Latency

E.

Count

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Question # 14

A developer needs to set up an API to provide access to an application and its resources. The developer has a TLS certificate. The developer must have the ability to change the default base URL of the API to a custom domain name. The API users are distributed globally. The solution must minimize API latency.

A.

Create an Amazon CloudFront distribution that uses an AWS Lambda@Edge function to process API requests. Import the TLS certificate into AWS Certificate Manager and CloudFront. Add the custom domain name as an alias resource record set that is for the CloudFront distribution.

B.

Create an Amazon API Gateway REST API. Use the private endpoint type. Import the TLS certificate into AWS Certificate Manager. Create a custom domain name for the REST API. Route traffic to the custom domain name. Disable the default endpoint for the REST API.

C.

Create an Amazon API Gateway REST API. Use the edge-optimized endpoint type. Import the TLS certificate into AWS Certificate Manager. Create a custom domain name for the REST API. Route traffic to the custom domain name. Disable the default endpoint for the REST API.

D.

Create an Amazon CloudFront distribution that uses CloudFront Functions to process API requests. Import the TLS certificate into AWS Certificate Manager and CloudFront. Add the custom domain name as an alias resource record set that is for the CloudFront distribution.

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Question # 15

When a developer tries to run an AWS Code Build project, it raises an error because the length of all environment variables exceeds the limit for the combined maximum of characters.

What is the recommended solution?

A.

Add the export LC-_ALL " on _ US, tuft " command to the pre _ build section to ensure POSIX Localization.

B.

Use Amazon Cognate to store key-value pairs for large numbers of environment variables

C.

Update the settings for the build project to use an Amazon S3 bucket for large numbers of environment variables

D.

Use AWS Systems Manager Parameter Store to store large numbers ot environment variables

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Question # 16

A developer is working on an AWS Lambda function that accesses Amazon DynamoDB. The Lambda function must retrieve an item and update some of its attributes, or create the item if it does not exist. The Lambda function has access to the primary key.

Which IAM permissions should the developer request for the Lambda function to achieve this functionality?

A)

B)

C)

D)

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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