Angular
A full-featured TypeScript-based frontend framework maintained by Google — dominant in enterprise and government applications.
Angular is a comprehensive, opinionated framework that includes everything needed to build large-scale web applications: routing, forms, HTTP, dependency injection, and testing. It's less common at startups but remains the standard at many large enterprises, banks, government contractors, and healthcare organizations.
Typical time to job-readiness: ~3 months.
Learning Angular
Beginner
Understand what makes Angular different — modules, dependency injection, and the component lifecycle — before writing much code. The conceptual model is the hard part.
Intermediate
Work with RxJS Observables, Angular Router with guards and resolvers, reactive forms, and the Angular CLI. Build and test a real feature end-to-end.
Advanced
Optimize change detection with OnPush strategy, architect large applications with lazy loading and micro-frontend patterns, and write custom pipes and decorators. Enterprise roles assess system design judgment.
Key concepts
- Dependency injection — Angular's core mechanism for sharing services
- Component lifecycle hooks (ngOnInit, ngOnChanges, ngOnDestroy)
- RxJS Observables for handling async data streams
- Angular modules (NgModules) and lazy loading for performance
- Reactive forms and template-driven forms
- Change detection strategies: Default vs OnPush
Common interview topics
- Explain Angular's dependency injection and how services are provided
- How does change detection work and what is OnPush strategy
- What is RxJS and why does Angular use it instead of Promises
- Explain the difference between reactive forms and template-driven forms
- How do you optimize the performance of a large Angular application