What is the role of FormControl, FormGroup, and FormArray in reactive forms?

Short answer: Class Role FormContr ol Tracks value and validation status of a single input FormGroup Groups multiple FormControls into a form FormArray Manages an array of FormControls or FormGroups dynamically

Example code

Class Role
FormContr ol Tracks value and validation status of a single input FormGroup Groups multiple FormControls into a form
FormArray Manages an array of FormControls or FormGroups dynamically

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.