Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A developer is setting up a CI/CD pipeline using AWS CodePipeline to deploy an application to Amazon ECS. The pipeline has a source stage that pulls code from an AWS CodeCommit repository. The developer wants the pipeline to execute only when commits are pushed to the 'main' branch. How should the developer configure this?
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
Create an Amazon CloudWatch Events rule that triggers the pipeline only when the branch is 'main'.
While this could work, it is more complex than the built-in option. CodePipeline's source action can directly set the branch, making separate rules unnecessary.
B
Best answer
Configure the pipeline's source stage to include the branch name in the CodeCommit action configuration.
The CodeCommit source action in CodePipeline allows you to specify the branch name. The pipeline will automatically start on pushes to that branch.
C
Distractor review
Use an AWS Lambda function in the source stage to filter the branch.
Adding a Lambda function adds complexity and is not needed because CodePipeline natively supports branch filtering.
D
Distractor review
Set a branch filter pattern in the pipeline trigger settings.
CodePipeline triggers do not have a branch filter setting; the branch is set in the source action configuration.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
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?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Configure the pipeline's source stage to include the branch name in the CodeCommit action configuration. — In AWS CodePipeline, when using CodeCommit as a source, you specify the branch name directly in the source action configuration. The pipeline will trigger only on changes to that branch. CloudWatch Events can trigger pipelines, but they are not necessary since CodePipeline already supports push events from CodeCommit for a specified branch. Using a Lambda function for filtering adds unnecessary complexity.
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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