Task 2: Develop Code for AWS Lambda DVA-C02 Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   A developer wants to store configuration values that change between environments (e.g., database connection strings) for a Lambda function. What is the recommended way to provide these values to the function code?

   • AUse environment variables
   • BHard-code the values in the function code
   • CStore them in a local file in the deployment package
   • DPut them in the function name
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   A Lambda function is processing messages from an Amazon SQS queue. The function fails to process a message and returns an error. What is the recommended way to capture the failed message for later analysis?

   • ASet the function's timeout to a higher value
   • BConfigure a Lambda destination of type 'On failure' to send the event to an SQS queue
   • CUse the function's CloudWatch Logs to store the message
   • DEnable X-Ray tracing on the function
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   A developer wants a Lambda function to run automatically whenever a new object is uploaded to an Amazon S3 bucket. What should be configured to achieve this?

   • AA scheduled CloudWatch Events rule
   • BAn S3 bucket notification that triggers the Lambda function
   • CAn API Gateway endpoint
   • DA VPC endpoint for S3
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5. 19expert · hard

   A company has a Lambda function that is invoked by an API Gateway REST API. The function performs a quick operation and returns a response. The developer wants to add a caching layer to reduce the number of invocations. What is the best way to achieve this?

   • AIncrease the function's memory to improve performance.
   • BEnable API Gateway caching on the stage.
   • CUse a Lambda destination to cache the response in DynamoDB.
   • DUse a CloudFront distribution in front of the API Gateway.
   Reveal Solution Discussion Select an answer first
6. 20expert · hard

   A developer is deploying a Lambda function that needs to access a private RDS database. The function is also required to call an external HTTPS API. The developer has attached the function to a VPC with private subnets. The function can reach the database but times out when calling the external API. What is the most likely cause and solution?

   • AThe function's security group does not allow outbound HTTPS traffic. Add an outbound rule for port 443.
   • BThe function's timeout is too short. Increase the timeout to allow more time for the API call.
   • CThe function does not have a route to the internet. Add a NAT gateway to the VPC.
   • DThe function's memory is too low. Increase the memory to improve network throughput.
   Reveal Solution Discussion Select an answer first