Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A developer is using AWS Elastic Beanstalk to deploy a web application. The application uses an Amazon RDS database instance that is included in the Elastic Beanstalk environment. The developer wants to update the application code without affecting the database. What is the recommended approach?
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
Update the application code directly on the EC2 instances without redeploying the environment.
Manual updates on EC2 instances are not managed, break environment consistency, and are not a recommended deployment practice.
B
Distractor review
Create a new environment configuration, update the code, and swap the CNAME of the environments.
CNAME swap allows zero-downtime deployment, but the database is still part of the environment. Any changes to the database configuration in the new environment could affect the database.
C
Best answer
Decouple the database from the Elastic Beanstalk environment by creating a separate RDS instance and connecting the application to it externally.
By creating an independent RDS instance and configuring the Elastic Beanstalk environment to connect to it via environment properties, the database is unaffected by application updates or environment changes.
D
Distractor review
Use Elastic Beanstalk's platform updates while keeping the database attached to the environment.
Platform updates affect the entire environment, including the database if it is part of the environment. The database remains at risk during updates.
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: Decouple the database from the Elastic Beanstalk environment by creating a separate RDS instance and connecting the application to it externally. — The best practice is to decouple the database from the Elastic Beanstalk environment by creating a separate RDS instance and connecting the application to it externally. This ensures that environment updates, redeployments, or even termination do not impact the database. Option A is unreliable and does not follow Elastic Beanstalk deployment practices. Option B (CNAME swap) works for environment swaps but does not protect the database if the environment is changed. Option D still ties the database to the environment, risking data loss during environment operations.
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.
Discussion
Loading comments…
Sign in to join the discussion.