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Amazon Web Services DVA-C02 - AWS Certified Developer - Associate

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Total 425 questions

A developer maintains a serverless application that uses an Amazon API Gateway REST API to invoke an AWS Lambda function by using a non-proxy integration. The Lambda function returns data, which is stored in Amazon DynamoDB.

Several application users begin to receive intermittent errors from the API. The developer examines Amazon CloudWatch Logs for the Lambda function and discovers several ProvisionedThroughputExceededException errors.

The developer needs to resolve the errors and ensure that the errors do not reoccur.

A.

Use provisioned capacity mode for the DynamoDB table, and assign sufficient capacity units. Configure the Lambda function to retry requests with exponential backoff.

B.

Update the REST API to send requests on an Amazon SQS queue. Configure the Lambda function to process requests from the queue.

C.

Configure a usage plan for the REST API.

D.

Update the REST API to invoke the Lambda function asynchronously.

A developer is designing an AWS Lambda function that creates temporary files that are less than 10 MB during invocation. The temporary files will be accessed and modified multiple times during invocation. The developer has no need to save or retrieve these files in the future.

Where should the temporary files be stored?

A.

the /tmp directory

B.

Amazon Elastic File System (Amazon EFS)

C.

Amazon Elastic Block Store (Amazon EBS)

D.

Amazon S3

A company is migrating legacy internal applications to AWS. Leadership wants to rewrite the internal employee directory to use native AWS services. A developer needs to create a solution for storing employee contact details and high-resolution photos for use with the new application.

Which solution will enable the search and retrieval of each employee's individual details and high-resolution photos using AWS APIs?

A.

Encode each employee's contact information and photos using Base64. Store the information in an Amazon DynamoDB table using a sort key.

B.

Store each employee's contact information in an Amazon DynamoDB table along with the object keys for the photos stored in Amazon S3.

C.

Use Amazon Cognito user pools to implement the employee directory in a fully managed software-as-a-service (SaaS) method.

D.

Store employee contact information in an Amazon RDS DB instance with the photos stored in Amazon Elastic File System (Amazon EFS).

A developer runs an application that displays scores for sports games on Amazon EC2 instances. The application uses a Redis client to retrieve the scores from an Amazon ElastiCache (Redis OSS) cluster.

The developer observes increased latency during operations on the cache because of connection failures to the cluster. The developer needs to resolve the latency issues.

A.

Configure the Redis client to use an exponential backoff retry strategy to establish cache connections.

B.

Store the scores in the application's memory. Perform bulk set operations on the scores that are stored in memory.

C.

Configure the Redis client in the application to persist connections to the cluster by implementing a connection pool.

D.

Deploy more nodes in the ElastiCache cluster. Update the Redis client to discover the new nodes.

A company is using AWS CloudFormation to deploy a two-tier application. The application will use Amazon RDS as its backend database. The company wants a solution that will randomly generate the database password during deployment. The solution also must automatically rotate the database password without requiring changes to the application.

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

A.

Use an AWS Lambda function as a CloudFormation custom resource to generate and rotate the password.

B.

Use an AWS Systems Manager Parameter Store resource with the SecureString data type to generate and rotate the password.

C.

Use a cron daemon on the application s host to generate and rotate the password.

D.

Use an AWS Secrets Manager resource to generate and rotate the password.

A company needs to deploy all its cloud resources by using AWS CloudFormation templates A developer must create an Amazon Simple Notification Service (Amazon SNS) automatic notification to help enforce this rule. The developer creates an SNS topic and subscribes the email address of the company's security team to the SNS topic.

The security team must receive a notification immediately if an 1AM role is created without the use of CloudFormation.

Which solution will meet this requirement?

A.

Create an AWS Lambda function to filter events from CloudTrail if a role was created without CloudFormation Configure the Lambda function to publish to the SNS topic. Create an Amazon EventBridge schedule to invoke the Lambda function every 15 minutes

B.

Create an AWS Fargate task in Amazon Elastic Container Service (Amazon ECS) to filter events from CloudTrail if a role was created without CloudFormation Configure the Fargate task to publish to the SNS topic Create an Amazon EventBridge schedule to run the Fargate task every 15 minutes

C.

Launch an Amazon EC2 instance that includes a script to filter events from CloudTrail if a role was created without CloudFormation. Configure the script to publish to the SNS topic. Create a cron job to run the script on the EC2 instance every 15 minutes.

D.

Create an Amazon EventBridge rule to filter events from CloudTrail if a role was created without CloudFormation Specify the SNS topic as the target of the EventBridge rule.

A developer is creating a simple proof-of-concept demo by using AWS CloudFormation and AWS Lambda functions The demo will use a CloudFormation template to deploy an existing Lambda function The Lambda function uses deployment packages and dependencies stored in Amazon S3 The developer defined anAWS Lambda Function resource in a CloudFormation template. The developer needs to add the S3 bucket to the CloudFormation template.

What should the developer do to meet these requirements with the LEAST development effort?

A.

Add the function code in the CloudFormation template inline as the code property

B.

Add the function code in the CloudFormation template as the ZipFile property.

C.

Find the S3 key for the Lambda function Add the S3 key as the ZipFile property in the CloudFormation template.

D.

Add the relevant key and bucket to the S3Bucket and S3Key properties in the CloudFormation template

A developer is creating an Amazon DynamoDB table by using the AWS CLI The DynamoDB table must use server-side encryption with an AWS owned encryption key

How should the developer create the DynamoDB table to meet these requirements?

A.

Create an AWS Key Management Service (AWS KMS) customer managed key. Provide the key's Amazon Resource Name (ARN) in the KMSMasterKeyld parameter during creation of the DynamoDB table

B.

Create an AWS Key Management Service (AWS KMS) AWS managed key Provide the key's Amazon Resource Name (ARN) in the KMSMasterKeyld parameter during creation of the DynamoDB table

C.

Create an AWS owned key Provide the key's Amazon Resource Name (ARN) in the KMSMasterKeyld parameter during creation of the DynamoDB table.

D.

Create the DynamoDB table with the default encryption options

A company launched an online portal to announce a new product that the company will release in 6 months. The portal requests that users enter an email address to receive communications about the product. The company needs to create a REST API that will store the email addresses in Amazon DynamoDB.

A developer has created an AWS Lambda function that can store the email addresses. The developer will deploy the Lambda function by using the AWS Serverless Application Model (AWS SAM). The developer must provide access to the Lambda function over HTTP.

Which solutions will meet these requirements with the LEAST additional configuration? (Select TWO.)

A.

Expose the Lambda function by using function URLs.

B.

Expose the Lambda function by using a Gateway Load Balancer.

C.

Expose the Lambda function by using a Network Load Balancer.

D.

Expose the Lambda function by using AWS Global Accelerator

E.

Expose the Lambda function by using Amazon API Gateway.

A developer needs to troubleshoot an AWS Lambda function in a development environment. The Lambda function is configured in VPC mode and needs to connect to an existing Amazon RDS for SOL Server DB instance. The DB instance is deployed in a private subnet and accepts connections by using port 1433.

When the developer tests the function, the function reports an error when it tries to connect to the database.

Which combination of steps should the developer take to diagnose this issue? (Select TWO.)

A.

Check that the function's security group has outbound access on port 1433 to the DB instance's security group. Check that the DB instance's security group has inbound access on port 1433 from the function's security group.

B.

Check that the function's security group has Inbound access on port 1433 from the DB Instance's security group. Check that the DB instance's security group has outbound access on port 1433 to the function's security group.

C.

Check that the VPC is set up for a NAT gateway. Check that the DB instance has the public access option turned on.

D.

Check that the function's execution role permissions include rds:DescribeDBInstances, rds: ModifyDB Instance, and rds:DescribeDBSecurityGroups for the DB instance.

E.

Check that the function's execution rote permissions include ec2: CreateNetworklnterface. ec2: DescribeNetworklnterfaces. and ec2: DeleteNetworklnterface.