Your Application Gateway is returning HTTP 502 (Bad Gateway) errors to clients. You suspect the backend servers are not responding correctly. Where should you look first to determine why Application Gateway considers the backend servers unhealthy?

Direct Answer (Verified)Reviewed by Sunny (Senior Cloud Engineer)

Correct Answer: Backend Health view in the Azure Portal

The Backend Health view in the Application Gateway blade specifically reports the status of health probes against the backend pool members. If a server is failing the probe, this v...

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Real Exam ScenarioApplication Gateway

Your Application Gateway is returning HTTP 502 (Bad Gateway) errors to clients. You suspect the backend servers are not responding correctly. Where should you look first to determine why Application Gateway considers the backend servers unhealthy?

✓ Correct Answer & ExplanationApplication Gateway

Correct Answer

Backend Health view in the Azure Portal

Why This Answer Is Correct

The Backend Health view in the Application Gateway blade specifically reports the status of health probes against the backend pool members. If a server is failing the probe, this view will show the status as 'Unhealthy' and provide the exact error reason (e.g., HTTP 404 returned, timeout), making it the best first step for 502 errors.

📚 What This Question Tests

This question evaluates your knowledge of Application Gateway — a core concept tested in Microsoft Certified: Azure Network Engineer Associate (AZ-700). Understanding Application Gateway is essential for designing scalable, secure, and cost-effective cloud architectures. Mastery of this topic will help you answer scenario-based questions confidently on exam day.

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More Application Gateway Practice Questions

You are designing an application delivery solution for an e-commerce website. You need SSL offloading, URL path-based routing (e.g., /images to one server pool and /video to another), and protection against SQL injection attacks. The application is hosted entirely in a single Azure region. Which service should you choose?

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