PROFESSIONAL-CLOUD-DEVELOPER Question #362: Real Exam Question with Answer & Explanation

Question

You work for an organization that manages an ecommerce site. Your application is deployed behind an external Application Load Balancer. You need to test a new product recommendation algorithm. You plan to use A/B testing to determine the new algorithm's effect on sales in a randomized way. How should you test this feature?

Options

• ASplit traffic between versions using weights.
• BEnable the new recommendation feature flag on a single instance.
• CMirror traffic to the new version of your application.
• DUse HTTP header-based routing.

Explanation

A/B testing requires distributing traffic in a controlled, randomized manner between different versions of your application. Weighted traffic splitting allows you to direct a specific percentage of traffic to the new version (with the new algorithm) and the rest to the current version. This approach provides a statistically valid way to compare the two versions’ performance and assess the impact on sales. HTTP header-based routing could target specific user segments but would not ensure random distribution for A/B testing. Mirroring traffic duplicates requests without user interactions being served by the new version, which doesn’t provide direct test results. Enabling the feature on a single instance does not provide a randomized, scalable test approach.

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