Angular interview questions with answers

Knowing Angular and still not able to crack interviews , then you are at the right place. :-)

This course focuses on revising most asked interview questions around Angular.  Interview is all about expressing your answers in a precise and proper way. You can have tons of knowledge , you must have done tons of coding but cracking interview is a different ball game.

This course is revision course where i have focused on what kind of questions are asked and how to answer them in a elaborate way. Please note this course does not teach Angular , if you want to learn Angular please check my Learn Angular step by step video series.

Below are the questions covered in this course, Happy learning , Happy job hunting.

25 Interview Questions on Angular basic concepts - Part 1.

• Question 1 :- Whats the use  of Angular ?

• Question 2 :- What are directives in Angular  ?

• Question 3 :- Explain the different types of Angular directives  ?

• Question 4 :- Explain the importance of NPM and Node_Modules folder ?

• Question 5 :- Explain the importance of Package.json file in Angular ?

• Question 6 :- What is typescript and why do we need it ?

• Question 7 :- Explain importance of Angular CLI ?

• Question 8 :- Explain the importance of Component and Modules ?

• Question 9 :- What is a decorator in Angular ?

• Question 10 :- What are Annotation or MetaData ?

• Question 11 :- What is a template ?

• Question 12 :- Explain the four types of Data bindings in Angular ?

• Question 13 :- Explain architecture of Angular ?

• Question 14 :- What is SPA in Angular ?

• Question 15 :- How to implement SPA in Angular ?

• Question 16 :- How to implement routing in Angular ?

• Question 17 :- Explain Lazy Loading ?

• Question 18 :- How to implement Lazy Loading in Angular ?

• Question 19 :- Define Services ?

• Question 20 :- What is Dependency Injection ?

• Question 21 :- How to implement Dependency Injection ?

• Question 23 :- Whats the benefit of Dependency Injection ?

• Question 24 :- Differentiate between ng serve and ng build ?

• Question 25 :- Explain the --prod parameter in ng build ?

Covered 6 Important questions on ViewChild and ViewChildren in Angular - Part 2.

• Question 26 :- Explain ViewChild and ViewChildren ?

• Question 27 :- Why do we need Template reference variables ?

• Question 28 :- What is ContentProjection ?

• Question 29 :- Explain Content projection Slot ?

• Question 30 :- What is ContentChild and ContentChildren?

• Question 31 :- ViewChild vs ViewChildren vs ContentChild vs ContentChildren ?

Questions around Angular component lifecycle - Part 3.

• Question 32 :- Explain the importance of Component life cycle ?

• Question 33 :- Explain events and sequence of component life cycle ?

• Question 34 :- constructor vs ngOnInit() ?

Tricky Interview questions on HTTP calls, Emitters & Routing - Part 4.

• Question 35 :- How to make HTTP calls using Angular ?

• Question 36 :- What is the need of Subscribe function ?

• Question 37 :- How to handle errors when HTTP fails ?

• Question 38 :- How to pass data between components ?

• Question 39 :- What are input , output and event emitters ?

• Question 40 :- How to pass data during routing ?

• Question 41 :- Is it a good practice to pass data using services ?

Questions on Angular Pipes - Part 5.

• Question 42 :- What is the need of Angular Pipes ?

• Question 43 :- Can you name some built-in Angular pipes ?

• Question 44 :- How to create Custom pipes in Angular ?

Ten important questions on RxJS (Reactive Extensions for JavaScript) - Part 6

• Question 45 :- What is the fullform of RxJS ?

• Question 46 :- What is the purpose of RxJS ?

• Question 47 :- What are Observables and Observers ?

• Question 48 :- Explain the use of Subscribe with sample code ?

• Question 49 :- How to unsubscriber in RxJS ?

• Question 50 :- Explain the concept of operators with sample code?

• Question 51 :- How to install RxJS ?

• Question 52 :- Differntiate between promise and RxJS ?

• Question 53 :- In Angular where have you used RxJS?

• Question 54 :- Which operators have used from RxJS ?

• Question 55 :- What is the Push/Reactive vs Pull/Imperative?

Essential questions around Interceptors - Part 7.

• Question 56 :- What are Interceptors in Angular?

• Question 57 :- How to implement Interceptors?

• Question 58 :- Give some use of Interceptors?

• Question 59 :- Can we provide multi-Interceptors?

13 Important Interview Questions on Angular Validations - Part 8

• Question 60 :- What are two ways of doing validation in Angular?

• Question 61 :- Template driven forms VS Reactive Forms?

• Question 62 :- In what situations you will use what?

• Question 63 :- Explain template reference variables ?

• Question 64 :- How do we implement Template driven forms?

• Question 65 :- How do we implement Reactive forms ?

• Question 66 :- How can we implement composite validations?

• Question 67 :- How to create dynamic validation ?

• Question 68 :- How to check if overall validation and specific validations are good ?

• Question 69 :- Can you talk about some inbuilt validators ?

• Question 70:- How can you create your own custom validator ?

• Question 71:- Can we implement angular validators with out FORM tag ?

• Question 72:- What is [ngModelOptions]="{standalone: true}" ?