Angular Interview Questions

1.  What is the whole goal of Angular ?
2.  What are directives in Angular and how many types of directives exists?
3.  Explain data bindings and different types of the same?
4.  Explain the basic components involved in Angular ?
5.  Difference between AngularJS vs Angular?
6.  What are component and modules in Angular?
7.  What are decorators in Angular ?
8.  What is metadata or annotations in Angular ?
9.  What are templates in Angular ?
10.  What is SPA and how to implement in Angular ?
11.  Explain the importance of routing in Angular & how to implement?
12.  What is Lazy loading concept in Angular
13.  How to implement lazy loading in Angular?
14.  What is node ?
15.  What is NPM
16.  What is the importance of node_modules folder ?
17.  What is packagejson ?
18.  What is typescript?
19.  What is the need of Angular CLI ?
20.  What are services in Angular ?
21.  In What scenarios will we use content projection ?
22.  Explain Content Projection Slots in Angular?
23.  Why do we need “ViewChild” and “ViewChildren” in Angular?
24.  What’s Template reference variable
25.  Explain “ContentChild” and “ContentChildren” ?
26.  Differentiate between ViewChild , ViewChildren , ContentChild and ContentChildren ?
27.  What is { static: true } in ViewChild ?
28.  What’s the importance Angular component hooks / life cycle?
29.  Explain in detail Angular life cycle hooks?   
30.  Differentiate between “constructor” and “ngOnInit()” ?   
31.  How to implement lazy loading in Angular?   
32.  How to implement HTTP in Angular ?   
33.  How to pass data between components?   
34.  What are pipes ?   
35.  Can you give some examples of inbuilt Angular pipes ?   
36.  How can we write a custom pipe ?   
37.  What is RxJs and why do we need it ?   
38.  What are observables and observers?  
39.  What is stream in RxJs ?   
40.  What is the use of subscribe in RxJs ?   
41.  How to unsubscribe from the stream ?   
42.  What are operators in RxJs?   
43.  Where did you use RxJs in Angular ?   
44.  Differentiate between RxJs and Promises?   
45.  How to install rxJs ?   
46.  Why is rxjs called Push/Reactive not pull/imperative ?   
47.  Name some rxJs Operators ?   
48.  What are interceptors in Angular?   
49.  How to implement interceptors?   
50.  Give some use of Interceptors?   
51.  Can we provide multi-interceptors?   
52.  Notes by author for further book expanstion