Most Frequently Asked Angular Interview Questions

Certainly! Here's a list of frequently asked Angular interview questions that cover various aspects of the framework:

Core Concepts and Features:

1. What is Angular?
2. What are the key features of Angular?
3. What are the differences between AngularJS and Angular?
4. What is TypeScript and why is it used in Angular?
5. Explain the Angular application architecture.

Components and Directives:

6. What are Angular components?
7. What is the role of @Component decorator in Angular?
8. What are directives in Angular?
9. Explain the differences between structural and attribute directives.
10. How would you create a custom directive in Angular?

Templates and Data Binding:

11. What is data binding in Angular?
12. Explain the different types of data binding supported by Angular.
13. What is interpolation in Angular?
14. How does property binding work in Angular?
15. What is event binding in Angular?

Services and Dependency Injection:

16. What are Angular services?
17. What is Dependency Injection (DI) and how is it used in Angular?
18. How would you create a service in Angular?
19. What is the difference between @Injectable and @Inject in Angular?
20. How do you inject a service into a component in Angular?

Routing and Navigation:

21. What is Angular Router?
22. How do you define routes in Angular?
23. Explain the difference between ActivatedRoute and RouterState in Angular.
24. How would you guard routes in Angular?
25. What is lazy loading in Angular?

Forms:

26. Explain template-driven forms vs. reactive forms in Angular.
27. How do you perform form validation in Angular?
28. What are form controls and how are they represented in Angular?
29. How would you handle form submission in Angular?

Observables and RxJS:

30. What are observables in Angular?
31. Explain the role of RxJS in Angular.
32. How do you unsubscribe from an observable in Angular?
33. What are the common operators used in RxJS?

Testing:

34. How would you write unit tests for Angular components?
35. What is TestBed in Angular testing?
36. Explain the concept of mocking dependencies in Angular testing.

Miscellaneous:

37. What are Angular modules and why are they used?
38. How do you handle HTTP requests in Angular?
39. What are Angular decorators and give examples?
40. What are some best practices for Angular development?

These questions cover a broad spectrum of topics typically encountered in Angular interviews. It's important to not only understand the concepts but also be able to provide practical examples or scenarios where these concepts are applied.