Task 2: Develop Code for AWS Lambda DVA-C02 Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A developer is testing a Lambda function locally. The function uses environment variables for configuration, including a database connection string. The developer wants to test the function with the same environment variables that are set in AWS. What is the most efficient way to do this?

   • ACreate a test event in the AWS Management Console and invoke the function from there.
   • BUse the AWS SDK to programmatically retrieve the environment variables and set them in the code.
   • CUse the AWS CLI to download the environment variables and set them manually in the local environment.
   • DUse the AWS SAM CLI to invoke the function locally with the '--env-vars' parameter.
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2. 12application · medium

   A developer is writing a Lambda function that needs to query an Amazon RDS database in a private subnet. The function currently times out when invoked from the console. The developer has already attached the function to the VPC with the correct subnets and security groups. What should the developer do to resolve the timeout?

   • AIncrease the function's memory allocation to improve network throughput.
   • BEnsure the function's security group allows outbound traffic to the database's security group on the database port.
   • CAdd a VPC endpoint for Amazon RDS to the VPC.
   • DPlace the Lambda function in a public subnet so it can route to the database.
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4. 13application · medium

   A company runs a Lambda function that processes image uploads. The function currently has a timeout of 30 seconds and a memory of 512 MB. Recent uploads have increased in size, and the function is now timing out. The developer needs to handle larger files without changing the code. What is the most effective configuration change?

   • AIncrease the timeout to 5 minutes and leave memory unchanged.
   • BChange the runtime to a newer version to improve performance.
   • CIncrease the concurrency limit to allow parallel processing of the same file.
   • DIncrease the memory to 1024 MB and the timeout to 1 minute.
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5. 14application · medium

   A developer is building a serverless application that processes files uploaded to an S3 bucket. The developer wants to trigger a Lambda function for each new object. The function needs to know the bucket name and object key. What is the correct way to configure this?

   • ACreate an S3 event notification that sends an event to the Lambda function.
   • BConfigure the Lambda function to be triggered by an SNS topic.
   • CSet up a CloudWatch Events rule that triggers the Lambda function on a schedule.
   • DUse an SQS queue as a trigger and have the Lambda function poll the queue.
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6. 15foundation · easy

   Which Lambda setting controls the maximum number of concurrent executions for a function?

   • AMemory
   • BRuntime
   • CTimeout
   • DReserved concurrency
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