What is the Angular compiler, and how does it work?

Short answer: The Angular compiler converts Angular templates and TypeScript code into efficient JavaScript code. There are two modes: JIT (Just-in-Time): Compilation happens in the browser at runtime. AOT (Ahead-of-Time): Compilation happens during the build phase, producing optimized JS files. It processes: Templates → render functions Metadata → static code to improve runtime Ivy compiler is the latest Angular compiler.

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.