Google Cloud Professional Cloud Developer — Question 102

You are designing a deployment technique for your new applications on Google Cloud. As part of your deployment planning, you want to use live traffic to gather performance metrics for both new and existing applications. You need to test against the full production load prior to launch. What should you do?

Answer options

• A. Use canary deployment
• B. Use blue/green deployment
• C. Use rolling updates deployment
• D. Use A/B testing with traffic mirroring during deployment

Correct answer: D

Explanation

The correct answer is D because A/B testing with traffic mirroring allows you to direct a portion of live traffic to the new application while still serving the existing application. This method provides real-world performance metrics under full production load. The other options, while useful in different contexts, do not provide the same level of direct performance comparison with live traffic.