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Legit DVA-C02 Exam Download

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Total 519 questions
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AWS Certified Developer - Associate Questions and Answers

Question 81

A developer is creating a stock trading application. The developer needs a solution to send text messages to application users to confirmation when a trade has been completed.

The solution must deliver messages in the order a user makes stock trades. The solution must not send duplicate messages.

Which solution will meet these requirements?

Options:

A.

Configure the application to publish messages to an Amazon Data Firehose delivery stream. Configure the delivery stream to have a destination of each user's mobile phone number that is passed in the trade confirmation message.

B.

Create an Amazon Simple Queue Service (Amazon SQS) FIFO queue. Use the SendMessageln API call to send the trade confirmation messages to the queue. Use the SendMessageOut API to send the messages to users by using the information provided in the trade confirmation message.

C.

Configure a pipe in Amazon EventBridge Pipes. Connect the application to the pipe as a source. Configure the pipe to use each user's mobile phone number as a target. Configure the pipe to send incoming events to the users.

D.

Create an Amazon Simple Notification Service (SNS) FIFO topic. Configure the application to use the AWS SDK to publish notifications to the SNS topic to send SMS messages to the users.

Question 82

A developer is creating an ecommerce workflow in an AWS Step Functions state machine that includes a HTTP Task state. The task passes shipping information and order details to an endpoint.

The developer needs to test the workflow to confirm that the HTTP headers and body are correct and that the responses meet expectations.

Options:

A.

Use the TestState API to invoke only the HTTP Task. Set the inspection level to TRACE.

B.

Use the TestState API to invoke the state machine. Set the inspection level to DEBUG.

C.

Use the data flow simulator to invoke only the HTTP Task. View the request and response data.

D.

Change the log level of the state machine to ALL. Run the state machine.

Question 83

A company has an analytics application that uses an AWS Lambda function to process transaction data asynchronously A developer notices that asynchronous invocations of the Lambda function sometimes fail When failed Lambda function invocations occur, the developer wants to invoke a second Lambda function to handle errors and log details.

Which solution will meet these requirements?

Options:

A.

Configure a Lambda function destination with a failure condition Specify Lambda function as the destination type Specify the error-handling Lambda function's Amazon Resource Name (ARN) as the resource

B.

Enable AWS X-Ray active tracing on the initial Lambda function. Configure X-Ray to capture stack traces of the failed invocations. Invoke the error-handling Lambda function by including the stack traces in the event object.

C.

Configure a Lambda function trigger with a failure condition Specify Lambda function as the destination type Specify the error-handling Lambda function's Amazon Resource Name (ARN) as the resource

D.

Create a status check alarm on the initial Lambda function. Configure the alarm to invoke the error-handling Lambda function when the alarm is initiated. Ensure that the alarm passes the stack trace in the event object.

Question 84

A developer is investigating an issue in part of a company's application. In the application messages are sent to an Amazon Simple Queue Service (Amazon SQS) queue The AWS Lambda function polls messages from the SQS queue and sends email messages by using Amazon Simple Email Service (Amazon SES) Users have been receiving duplicate email messages during periods of high traffic.

Which reasons could explain the duplicate email messages? (Select TWO.)

Options:

A.

Standard SQS queues support at-least-once message delivery

B.

Standard SQS queues support exactly-once processing, so the duplicate email messages are because of user error.

C.

Amazon SES has the DomainKeys Identified Mail (DKIM) authentication incorrectly configured

D.

The SQS queue's visibility timeout is lower than or the same as the Lambda function's timeout.

E.

The Amazon SES bounce rate metric is too high.

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Total 519 questions
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