DVA-C02 Question #255: Real Exam Question with Answer & Explanation

Question

A company recently deployed an AWS Lambda function. A developer notices an increase in the function throttle metrics in Amazon CloudWatch. What are the MOST operationally efficient solutions to reduce the function throttling? (Choose two.)

Options

• AMigrate the function to Amazon Elastic Kubernetes Service (Amazon EKS).
• BIncrease the maximum age of events in Lambda.
• CIncrease the function's reserved concurrency.
• DAdd the lambda:GetFunctionConcurrency action to the execution role.
• ERequest a service quota change for increased concurrency.

Explanation

Lambda throttling occurs when concurrent executions exceed the account or function limit; increasing reserved concurrency and requesting a quota increase are the two most direct operational solutions.

Common mistakes.

• A. Migrating to EKS changes the compute platform entirely and does not resolve Lambda concurrency throttling.
• B. The maximum age of events controls how long Lambda retains unprocessed events in the queue before discarding them; it does not affect concurrency or throttling rates.
• D. The lambda:GetFunctionConcurrency IAM action is a read permission to view concurrency settings; it does not increase available concurrency or reduce throttling.

Concept tested. Lambda concurrency limits and throttling remediation

Reference. https://docs.aws.amazon.com/lambda/latest/dg/configuration-concurrency.html

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