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Exam AWS Certified Developer - Associate DVA-C02 topic 1 question 111 discussion

Exam question from Amazon's AWS Certified Developer - Associate DVA-C02

Question #: 111
Topic #: 1

[All AWS Certified Developer - Associate DVA-C02 Questions]

A company has an image storage web application that runs on AWS. The company hosts the application on Amazon EC2 instances in an Auto Scaling group. The Auto Scaling group acts as the target group for an Application Load Balancer (ALB) and uses an Amazon S3 bucket to store the images for sale.

The company wants to develop a feature to test system requests. The feature will direct requests to a separate target group that hosts a new beta version of the application.

Which solution will meet this requirement with the LEAST effort?

A. Create a new Auto Scaling group and target group for the beta version of the application. Update the ALB routing rule with a condition that looks for a cookie named version that has a value of beta. Update the test system code to use this cookie to test the beta version of the application.
B. Create a new ALB, Auto Scaling group, and target group for the beta version of the application. Configure an alternate Amazon Route 53 record for the new ALB endpoint. Use the alternate Route 53 endpoint in the test system requests to test the beta version of the application.
C. Create a new ALB, Auto Scaling group, and target group for the beta version of the application. Use Amazon CloudFront with Lambda@Edge to determine which specific request will go to the new ALB. Use the CloudFront endpoint to send the test system requests to test the beta version of the application.
D. Create a new Auto Scaling group and target group for the beta version of the application. Update the ALB routing rule with a condition that looks for a cookie named version that has a value of beta. Use Amazon CloudFront with Lambda@Edge to update the test system requests to add the required cookie when the requests go to the ALB.

Show Suggested Answer

Suggested Answer: A 🗳️

by MrTee at April 22, 2023, 8:49 p.m.

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Comments

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MrTee

Highly Voted 2 years, 3 months ago

Selected Answer: A

This solution will allow the company to direct requests to a separate target group that hosts the new beta version of the application without having to create a new ALB or use additional services such as Amazon Route 53 or Amazon CloudFront. Option D adds additional complexity and effort compared to option A, which simply involves updating the ALB routing rule with a condition that looks for a cookie named version that has a value of beta and updating the test system code to use this cookie to test the beta version of the application.

upvoted 26 times

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backfringe

Highly Voted 1 year, 11 months ago

Selected Answer: B

Option B provides the simplest and least effort solution to test the beta version of the application. By creating a new ALB, Auto Scaling group, and target group for the beta version, the company can deploy the new version of the application separately from the production version. Configuring an alternate Amazon Route 53 record for the new ALB endpoint allows the test system requests to be directed to the beta version.

upvoted 8 times

wh1t4k3r

11 months ago

I will say that it is way simpler to create an ALB rule to a new tg and alter the beta app then create a new tg, a new alb and configure route 53 and then deploy the app

upvoted 1 times

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sumanshu

Most Recent 6 months, 3 weeks ago

Selected Answer: A

B) Eliminated - You need a second load balancer, which increases both costs and maintenance overhead. Testers must switch between different URLs to test the beta version, which is less seamless. C/D) Eliminated - Lambda@Edge increases complexity unnecessarily

upvoted 2 times

sumanshu

6 months, 3 weeks ago

A ) New Beta Group: You create a new "group of servers" (Auto Scaling group + target group) for the beta version of your app. These servers will run the updated beta code. Routing with Cookies: The existing load balancer is updated to check incoming requests for a specific cookie in the browser. If the cookie says something like version=beta, the load balancer will route the request to the beta servers. If there’s no cookie, the load balancer routes the request to the normal servers (current version). Test System’s Role: The test system (used by testers) adds the special cookie (version=beta) to its requests. This ensures only the testers access the beta version. Regular users don’t have this cookie, so they continue to see the normal version.

upvoted 1 times

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Anandesh

1 year ago

Selected Answer: A

https://aws.amazon.com/blogs/aws/new-advanced-request-routing-for-aws-application-load-balancers/

upvoted 1 times

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65703c1

1 year, 2 months ago

Selected Answer: A

A is the correct answer.

upvoted 1 times

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IvRa

1 year, 3 months ago

ChatGPT goes for D.

upvoted 1 times

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41eb566

1 year, 4 months ago

Selected Answer: B

The solution that will meet the requirement with the least effort is: B. Create a new ALB, Auto Scaling group, and target group for the beta version of the application. Configure an alternate Amazon Route 53 record for the new ALB endpoint. Use the alternate Route 53 endpoint in the test system requests to test the beta version of the application.

upvoted 1 times

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SerialiDr

1 year, 4 months ago

Selected Answer: A

This approach allows for the least amount of effort in setting up a beta environment where test system requests can be directed to a new version of the application for testing purposes. It leverages ALB's ability to conditionally route traffic based on request attributes, such as cookies, allowing for flexible and efficient testing of new application versions alongside existing production workloads.

upvoted 1 times

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SerialiDr

1 year, 6 months ago

Selected Answer: A

A. Create a new Auto Scaling group and target group for the beta version of the application. Update the ALB routing rule with a condition that looks for a cookie named version that has a value of beta. Update the test system code to use this cookie to test the beta version of the application: This is a straightforward and effective solution. By creating a new Auto Scaling group and target group for the beta version and updating the ALB to route based on a specific cookie, the company can easily direct test traffic to the beta version without needing additional infrastructure or complex configurations. The test system would simply include the specified cookie in its requests to access the beta version.

upvoted 1 times

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JohnPl

1 year, 6 months ago

Selected Answer: D

A is modifying the code for testing, not a good practice. D is the least effort compared to B and C

upvoted 2 times

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gqs3119

1 year, 6 months ago

Selected Answer: D

Modifying ALB (A/D) is less effort than modifying route 53 and adding ALB (B/C), 1 action vs 2. So it's A or D, let's think about effort in both cases. In case of A you will need to: 1.Add a new temporary code to set cookies 2.Test app with new temporary code, to make sure it won't break the production 3.Deploy it to the production After tests are finished: 4.Remove temporary code 5.Deploy to production In case of D you will need: 1.Create lambda 2.Do a simple testing to make sure it won't affect production After tests are finished: 3.Remove lambda I'd say D is the least effort.

upvoted 3 times

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a_win

1 year, 6 months ago

Selected Answer: A

requirement with the LEAST effort

upvoted 1 times

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LR2023

1 year, 7 months ago

Selected Answer: D

just using voting...explanation in a different thread

upvoted 3 times

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LR2023

1 year, 7 months ago

I am going with D..... https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/lambda-at-the-edge.html A Lambda function can inspect cookies and rewrite URLs so that users see different versions of a site for A/B testing. Option B & C requires to create new ALB - which is not least effort. And option A requires to update code.

upvoted 3 times

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