What is the purpose of the tsconfig.json file in Angular projects?

Short answer: tsconfig.json configures the TypeScript compiler.

Explain a bit more

Specifies: Target JS version (ES5/ES2015) Module system (ESNext/CommonJS) Included/excluded files Compiler options like strictness, decorators support Helps Angular’s build system transpile TS code to browser-compatible JS. Summary Table: Command/File Purpose Angular CLI Tool to scaffold, build, test Angular apps ng serve Run dev server with live reload ng build Compile and output build files Production Build ng build --prod enables optimizations angular.json CLI workspace/project configuration Custom Builder Extend Angular CLI build/serve functionality AOT Compilation Compile templates ahead-of-time for faster startup tsconfig.json TypeScript compiler options for Angular project Testing Angular Applications

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.