Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A developer is troubleshooting an AWS Lambda function that processes files uploaded to an Amazon S3 bucket. The function sometimes times out when processing large files. CloudWatch Logs show that the function's execution time correlates with file size. The function is configured with 128 MB memory and a timeout of 30 seconds. Which action should the developer take to resolve the timeout for large files without refactoring the code?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Increase the Lambda function's memory
Increasing memory can improve CPU performance and may reduce execution time, but it is not a direct fix for a timeout. If the function is I/O bound, more memory may not help, and the timeout may still occur.
B
Best answer
Increase the Lambda function's timeout
The timeout error occurs because the function exceeds the configured 30-second limit. Increasing the timeout allows large files more time to complete processing, directly resolving the error without code changes.
C
Distractor review
Increase the S3 event notification batch size
S3 event notifications are sent one per object; there is no batch size setting for S3 events. This option is not applicable and does not affect timeout.
D
Distractor review
Enable Lambda function reserved concurrency
Reserved concurrency limits the number of concurrent executions but does not affect the function's execution timeout. It might help with throttling but not with timeout errors.
Common exam trap
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Technical deep dive
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Related practice questions
Related DVA-C02 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A developer is building a REST API using Amazon API Gateway that will serve static content from an Amazon S3 bucket. The API should cache responses for frequently accessed objects to reduce latency. Which API Gateway feature should the developer enable?
Question 2
A developer is running a web application on multiple Amazon EC2 instances behind an Application Load Balancer (ALB). The application needs to store user session state that must be available across all instances. The session data is small and temporary but must survive individual instance failures. Which AWS service should the developer use to store this session state?
Question 3
A developer has an AWS Lambda function that processes messages from an Amazon SQS standard queue. The function is idempotent and currently has a batch size of 10. The developer wants to increase throughput and increases the batch size to 100. After the change, CloudWatch metrics show a significant increase in throttles and the queue backlog is growing. The function's reserved concurrency is set to 10. What is the most effective action to resolve the throttling and improve throughput?
Question 4
A developer is managing an application running on Amazon EC2 instances behind an Application Load Balancer. Users report that the application becomes unresponsive after several hours, and restarting the instance temporarily fixes the issue. The developer suspects a memory leak but cannot add custom instrumentation. Which AWS service can collect memory utilization metrics and help identify the memory leak with minimal configuration?
Question 5
A developer is building a serverless web application using AWS Lambda and Amazon DynamoDB. The application needs to perform complex aggregations on data stored in DynamoDB. Which AWS service should the developer use to perform these aggregations efficiently without reading all the data into Lambda?
Question 6
A developer has an Amazon S3 bucket containing private user documents. The application must generate a time-limited URL for users to download their own documents without requiring the users to have AWS credentials. Which solution should the developer use?
FAQ
Questions learners often ask
What does this DVA-C02 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Increase the Lambda function's timeout — The function is timing out because the execution time exceeds the configured timeout of 30 seconds. The most direct way to fix this without code changes is to increase the timeout setting. Increasing memory might also speed up execution, but it is not guaranteed to resolve the timeout if the code is I/O bound. Increasing the S3 batch size or reserved concurrency does not address the timeout issue. Therefore, increasing the timeout is the correct action.
What should I do if I get this DVA-C02 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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