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AWS Certified Developer - Associate Questions and Answers

Question 69

A developer has deployed an AWS Lambda function that is subscribed to an Amazon Simple Notification Service {Amazon SNS) topic. The developer must implement a solution to add a record of each Lambda function invocation to an Amazon Simple Queue Service {Amazon SQS) queue.

Which solution will meet this requirement?

Options:

Configure the SQS queue as a dead-letter queue for the Lambda function.

Create code that uses the AWS SDK to call the SQS SendMessage operation to add the invocation details to the SQS queue. Add the code to the end of the Lambda function.

Add two asynchronous invocation destinations to the Lambda function: one destination for successful invocations and one destination for failed invocations. Configure the SQS queue as the destination for each type. Create an Amazon CloudWatch alarm based on the DestinationDeliveryFailures metric to catch any message that cannot be delivered.

Add a single asynchronous invocation destination to the Lambda function to capture successful invocations. Configure the SQS queue as the destination. Create an Amazon CloudWatch alarm based on the DestinationDeliveryFailures metric to catch any message that cannot be delivered.

Question 70

An application uses AWS X-Ray to generate a large amount of trace data on an hourly basis. A developer wants to use filter expressions to limit the returned results through user-specified custom attributes.

How should the developer use filter expressions to filter the results in X-Ray?

Options:

Add custom attributes as annotations in the segment document.

Add custom attributes as metadata in the segment document.

Add custom attributes as new segment fields in the segment document.

Create new sampling rules that are based on custom attributes.

Question 71

A company has an application that uses an AWS Lambda function to process customer orders. The company notices that the application processes some orders more than once.

A developer needs to update the application to prevent duplicate processing.

Which solution will meet this requirement with the LEAST implementation effort?

Options:

Implement a de-duplication mechanism that uses Amazon DynamoDB as the control database. Configure the Lambda function to check for the existence of a unique identifier before processing each event.

Create a custom Amazon ECS task to perform idempotency checks. Use AWS Step Functions to integrate the ECS task with the Lambda function.

Configure the Lambda function to retry failed invocations. Implement a retry mechanism that has a fixed delay between attempts to handle duplicate events.

Use Amazon Athena to query processed events to identify duplicate records. Add processing logic to the Lambda function to handle the duplication scenarios that the query identifies.

Question 72

In a move toward using microservices, a company ' s management team has asked all development teams to build their services so that API requests depend only on that service ' s data store. One team is building a Payments service which has its own database; the service needs data that originates in the Accounts database. Both are using Amazon DynamoDB.

What approach will result in the simplest, decoupled, and reliable method to get near-real time updates from the Accounts database?

Options:

Use AWS Glue to perform frequent ETL updates from the Accounts database to the Payments database.

Use Amazon ElastiCache in Payments, with the cache updated by triggers in the Accounts database.

Use Amazon Data Firehose to deliver all changes from the Accounts database to the Payments database.

Use Amazon DynamoDB Streams to deliver all changes from the Accounts database to the Payments database.

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AWS Certified Developer - Associate Questions and Answers

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CompTIA

Fortinet

Microsoft

Salesforce