Task 1: Develop Code for Applications Hosted on AWS DVA-C02 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A company has a microservices architecture where a 'user-service' publishes events when a new user is created. A 'notification-service' and a 'analytics-service' both need to react to these events. The developer wants to use Amazon EventBridge to route these events. What should the developer configure?

   • AUse the default event bus and have the user-service publish events directly to it without any rules.
   • BCreate a custom event bus, have the user-service put events on the bus, and create rules that route matching events to each service's target.
   • CConfigure the user-service to invoke the notification-service and analytics-service Lambda functions directly via the SDK.
   • DCreate an SNS topic and have the user-service publish events to it, with the notification and analytics services as subscribers.
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2. 7foundation · easy

   What is the purpose of setting a timeout on an HTTP request in application code?

   • ATo reduce the payload size of the request.
   • BTo automatically retry the request after a failure.
   • CTo prevent the application from waiting indefinitely for a response.
   • DTo increase the request's priority in the network.
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4. 8foundation · easy

   Which AWS service provides a publish/subscribe pattern for sending messages to multiple subscribers?

   • AAmazon MQ
   • BAWS Step Functions
   • CAmazon SQS
   • DAmazon SNS
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5. 9expert · medium

   A developer is writing unit tests for a Lambda function that processes S3 events. The function reads the S3 object, parses it, and writes results to DynamoDB. The developer wants to test the function's logic without making actual AWS calls. The developer is using the AWS SDK and wants to mock the S3 and DynamoDB clients. Which testing approach should the developer use?

   • AUse the AWS SDK's built-in mocking capabilities to mock the S3 and DynamoDB clients.
   • BUse the AWS CLI to create test resources in a development account and run the function against them.
   • CUse a library like aws-sdk-client-mock or Jest to mock the S3 and DynamoDB clients and their methods.
   • DRun the function locally using sam local invoke and point it to a local DynamoDB instance.
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6. 10foundation · easy

   In Amazon EventBridge, what is the role of a rule?

   • ATo authenticate event producers.
   • BTo create new events.
   • CTo store events for later retrieval.
   • DTo define the pattern that matches events and routes them to targets.
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