What is JWT (JSON Web Token), and how is it used in Angular?

Short answer: JWT is a compact, URL-safe token format that securely transmits information between parties. Contains a payload with user info and claims, digitally signed. Angular apps use JWT to: Store authentication state. Send it with API requests to authorize access. Decode JWT to get user roles, expiry, etc.

Real-world example (ShopNest)

ShopNest admin can be built in Angular with modules/components, services for API calls, and reactive forms for product edit.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.