Task 1: Develop Code for Applications Hosted on AWS DVA-C02 Practice Questions (Page 6)

Questions 26–30

1. 26foundation · easy

   Which code pattern is used to handle transient failures when calling an AWS service?

   • ARetry with exponential backoff
   • BInfinite loop until success
   • CImmediate retry with no delay
   • DSingle attempt without error handling
   Reveal Solution Discussion Select an answer first
2. 27foundation · easy

   What is the purpose of the `sam local invoke` command?

   • ATo run a Lambda function locally for testing.
   • BTo create a new SAM project.
   • CTo view CloudWatch logs.
   • DTo deploy the SAM application to AWS.
   Reveal Solution Discussion Select an answer first
4. 28expert · hard

   A company is migrating a monolithic order-processing application to AWS. The application currently handles order placement, payment, inventory, and shipping in a single process. The company wants to improve scalability and resilience. The team is considering two options: (1) break the monolith into microservices that communicate via synchronous REST APIs, or (2) use an event-driven architecture with Amazon EventBridge and decoupled services. The team's primary concern is that a failure in one component (e.g., payment) should not block other components (e.g., inventory) from processing. Which architecture should the team choose?

   • AA single Lambda function that orchestrates all steps (order, payment, inventory, shipping) sequentially.
   • BMicroservices with synchronous REST APIs, using retries and timeouts to handle failures.
   • CEvent-driven architecture with EventBridge, where each service publishes and subscribes to events independently.
   • DMicroservices with an API Gateway that routes requests to each service synchronously.
   Reveal Solution Discussion Select an answer first
5. 29foundation · easy

   How does an AWS SDK typically authenticate API requests?

   • ABy including a session token in the request header.
   • BBy using a client certificate.
   • CBy signing the request with AWS credentials (access key and secret key).
   • DBy sending the password in the request body.
   Reveal Solution Discussion Select an answer first
6. 30foundation · easy

   What is a common strategy to handle a third-party API that occasionally returns a 5xx error?

   • AIgnore the error and continue.
   • BIncrease the timeout to 10 minutes.
   • CRetry the request a limited number of times with backoff.
   • DImmediately fail the request.
   Reveal Solution Discussion Select an answer first