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

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Total 425 questions

A developer is creating an application that uses an AWS Lambda function to transform and load data from an Amazon S3 bucket. When the developer tests the application, the developer finds that some invocations of the Lambda function are slower than others.

The developer needs to update the Lambda function to have predictable invocation durations that run with low latency. Any initialization activities, such as loading libraries and instantiating clients, must run during allocation time rather than during actual function invocations.

Which combination of steps will meet these requirements? (Select TWO.)

A.

Create a schedule group in Amazon EventBridge Scheduler to invoke the Lambda function.

B.

Configure provisioned concurrency for the Lambda function to have the necessary number of execution environments.

C.

Use the SLATEST version of the Lambda function.

D.

Configure reserved concurrency for the Lambda function to have the necessary number of execution environments.

E.

Deploy changes, and publish a new version of the Lambda function.

A developer is building an ecommerce application that uses AWS Lambda functions. Each Lambda function performs a specific step in a customer order workflow, such as order processing and inventory management. The developer must ensure that the Lambda functions run in a specific order.

Which solution will meet this requirement with the LEAST operational overhead?

A.

Configure an Amazon SQS queue to contain messages about each step that a Lambda function must perform. Configure the Lambda functions to run sequentially based on the order of messages in the SQS queue.

B.

Configure an Amazon SNS topic to contain notifications about each step that a Lambda function must perform. Subscribe the Lambda functions to the SNS topic. Use subscription filters based on the step that each Lambda function must perform.

C.

Configure an AWS Step Functions state machine to invoke the Lambda functions in a specific order.

D.

Configure Amazon EventBridge Scheduler schedules to invoke the Lambda functions in a specific order.

A company receives food orders from multiple partners. The company has a microservices application that uses Amazon API Gateway APIs with AWS Lambda integration. Each partner sends orders by calling a customized API that is exposed through API Gateway. The API call invokes a shared Lambda function to process the orders.

Partners need to be notified after the Lambda function processes the orders. Each partner must receive updates for only the partner's own orders. The company wants to add new partners in the future with the fewest code changes possible.

Which solution will meet these requirements in the MOST scalable way?

A.

Create a different Amazon Simple Notification Service (Amazon SNS) topic for each partner. Configure the Lambda function to publish messages for each partner to the partner's SNS topic.

B.

Create a different Lambda function for each partner. Configure the Lambda function to notify each partner's service endpoint directly.

C.

Create an Amazon Simple Notification Service (Amazon SNS) topic. Configure the Lambda function to publish messages with specific attributes to the SNS topic. Subscribe each partner to the SNS topic. Apply the appropriate filter policy to the topic subscriptions.

D.

Create one Amazon Simple Notification Service (Amazon SNS) topic. Subscribe all partners to the SNS topic.

A developer is building an application that uses Amazon DynamoDB. The developer wants to retrieve multiple specific items from the database with a single API call. Which DynamoDB API call will meet these requirements with the MINIMUM impact on the database?

A.

BatchGetltem

B.

Getltem

C.

Scan

D.

Query

A company’s website runs on an Amazon EC2 instance and uses Auto Scaling to scale the environment during peak times. Website users across the world ate experiencing high latency flue lo sialic content on theEC2 instance. even during non-peak hours.

When companion of steps mill resolves the latency issue? (Select TWO)

A.

Double the Auto Scaling group's maximum number of servers

B.

Host the application code on AWS lambda

C.

Scale vertically by resizing the EC2 instances

D.

Create an Amazon Cloudfront distribution to cache the static content

E.

Store the application’s sialic content in Amazon S3