Skip to Content

DVA-C02: How to Optimize Your AWS Lambda Function Performance for CPU-Bound Tasks

Learn how to improve the speed and efficiency of your AWS Lambda function for CPU-intensive tasks. Find out how to increase the function’s memory and how it affects the CPU allocation.


A developer has written an AWS Lambda function. The function is CPU-bound. The developer wants to ensure that the function returns responses quickly.

How can the developer improve the function’s performance?

A. Increase the function’s CPU core count.
B. Increase the function’s memory.
C. Increase the function’s reserved concurrency.
D. Increase the function’s timeout.


B. Increase the function’s memory.


The correct answer is B. Increase the function’s memory.

This answer is based on the documentation of AWS Lambda, which states that the amount of memory allocated to a Lambda function also determines how much CPU and network bandwidth are allocated to it. By increasing the function’s memory, the developer can also increase the function’s CPU power and network performance, which can improve the function’s speed and responsiveness. This is especially important for CPU-bound functions, which are functions that perform intensive computations and are limited by the CPU resources available.

The other options are not correct because:

  • Option A: Increasing the function’s CPU core count is not possible, as Lambda does not expose this configuration option to developers. The number of CPU cores available to a Lambda function depends on the memory size and the underlying hardware. Therefore, the developer cannot directly increase the function’s CPU core count.
  • Option C: Increasing the function’s reserved concurrency does not improve the function’s performance, but rather its scalability. Reserved concurrency is a feature that allows developers to set aside a portion of concurrency for a specific function. Concurrency is the number of requests that a function can process simultaneously. By increasing the reserved concurrency, the developer can ensure that the function has enough concurrency to handle incoming requests without being throttled by Lambda. However, this does not affect the performance of each individual invocation of the function.
  • Option D: Increasing the function’s timeout does not improve the function’s performance, but rather its reliability. The timeout setting determines how long Lambda allows a function to run before stopping it. If the timeout is reached, Lambda terminates the function and returns an error. By increasing the timeout, the developer can allow more invocations to complete successfully without being interrupted by Lambda. However, this does not affect the speed or responsiveness of each invocation of the function.

Therefore, option B is the best answer for this question.

The latest AWS Certified Developer – Associate DVA-C02 certification actual real practice exam question and answer (Q&A) dumps are available free, which are helpful for you to pass the AWS Certified Developer – Associate DVA-C02 exam and earn AWS Certified Developer – Associate DVA-C02 certification.

AWS Certified Developer - Associate DVA-C02 Exam Questions and Answers

Alex Lim is a certified IT Technical Support Architect with over 15 years of experience in designing, implementing, and troubleshooting complex IT systems and networks. He has worked for leading IT companies, such as Microsoft, IBM, and Cisco, providing technical support and solutions to clients across various industries and sectors. Alex has a bachelor’s degree in computer science from the National University of Singapore and a master’s degree in information security from the Massachusetts Institute of Technology. He is also the author of several best-selling books on IT technical support, such as The IT Technical Support Handbook and Troubleshooting IT Systems and Networks. Alex lives in Bandar, Johore, Malaysia with his wife and two chilrdren. You can reach him at [email protected] or follow him on Website | Twitter | Facebook

    Ads Blocker Image Powered by Code Help Pro

    Your Support Matters...

    We run an independent site that is committed to delivering valuable content, but it comes with its challenges. Many of our readers use ad blockers, causing our advertising revenue to decline. Unlike some websites, we have not implemented paywalls to restrict access. Your support can make a significant difference. If you find this website useful and choose to support us, it would greatly secure our future. We appreciate your help. If you are currently using an ad blocker, please consider disabling it for our site. Thank you for your understanding and support.