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DVA-C02 · Question #726

A developer writes an AWS Lambda function that processes new object uploads to an Amazon S3 bucket. The Lambda function runs for approximately 30 seconds. The function runs as expected under normal…

The correct answer is C. Configure a reserved concurrency quota for the function. Configuring a reserved concurrency quota for the Lambda function ensures that sufficient concurrency is always available for this function, preventing throttling during high-volume periods when many S3 events invoke it simultaneously. This guarantees consistent execution under…

Submitted by helene.fr· Mar 5, 2026Troubleshooting and Optimization

Question

A developer writes an AWS Lambda function that processes new object uploads to an Amazon S3 bucket. The Lambda function runs for approximately 30 seconds. The function runs as expected under normal load conditions. Other Lambda functions in the AWS account also run as expected. Occasionally, up to 500 new objects are written to the bucket every minute. Each new object write invokes the processing lambda function during the high-volume periods through an event. The developer must ensure that the processing function will continue to run as expected during the high-volume periods. Which solution will meet this requirement?

Options

  • AModify the function's timeout setting.
  • BAdd an additional layer to optimize the code execution.
  • CConfigure a reserved concurrency quota for the function.
  • DDecrease the function's memory allocation.

How the community answered

(53 responses)
  • A
    9% (5)
  • B
    4% (2)
  • C
    70% (37)
  • D
    17% (9)

Explanation

Configuring a reserved concurrency quota for the Lambda function ensures that sufficient concurrency is always available for this function, preventing throttling during high-volume periods when many S3 events invoke it simultaneously. This guarantees consistent execution under load.

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