Mock Interview
Stale Data Debugging
A deployed page shows old content for some users. Inspect browser cache, CDN headers, validators, Vary, and service worker behavior.
Cross-Origin API
An API works in Postman but fails in the browser. Explain preflight, allowed headers, credentials, cookie settings, and server auth.
Third-Party Trust
Review whether a third-party script, iframe, or embedded editor is safe on a sensitive frontend route.