Developer Interview Questions & Answers

Course Structure

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🔹 Angular-Introduction

Q. What is Angular?
Q. What are Angular Advantages?
Q. What is Angular Architecture?
Q. What is the difference between AngularJS and Angular?
Q. What is NPM?
Q. What are the common NPM commands?
Q. What is CLI tool?
Q. What is Typescript? What is the difference between Typescript and JavaScript?
Q. Where to store static files in Angular project?
Q. What is the role of Angular.json file in Angular?
Q. What is the difference between JIT and AOT in Angular?

🔹 Components & Modules

Q. What are Components in Angular? Why use Components?
Q. What is Real-World Angular project Component Structure?
Q. What is a Selector and Template?
Q. What is Module in Angular? What is app.module.ts file?
Q. How an Angular App gets Loaded and Started? What are index.html, app-root, selector and main.ts?
Q. What is a Bootstrapped Module & Bootstrapped Component?
Q. What is Difference between Module and Component?

🔹 Angular Data Binding

Q. What is Data Binding in Angular?
Q. What is String Interpolation in Angular?
Q. What is Property Binding in Angular?
Q. What is Class Binding in Angular?
Q. What is Attribute Binding in Angular?
Q. What is Style Binding in Angular?
Q. What is Event Binding in Angular?
Q. What is Two-way Binding in Angular?

🔹 Angular Directives

Q. What are Directives? What are the type of directives?
Q. What is *ngIf Structural directive?
Q. What is *ngFor Structural directive?
Q. What is *ngSwitch Structural directive?
Q. What is [ngStyle] Attribute directive?
Q. What is [ngClass] Attribute directive?
Q. What is the difference between Component, Attribute and Structural Directives?

🔹 Angular Decorator & Pipes

Q. What is Decorator?
Q. What are the types of Decorator?
Q. What are Angular Pipes? What are the types of Pipes?
Q. What are DatePipe and SlicePipe Angular Pipes?
Q. What is Async Pipe?
Q. What is Parameterized Pipes?
Q. What is Chaining Pipes?
Q. What is Angular Custom Pipes?

🔹 Angular Decorators & Lifecycle-Hooks

Q. What are Parent-Child Components?
Q. What is @Input Decorator? How to transfer data from Parent component to Child component?
Q. What is @Output Decorator and Event Emitter?
Q. What are Lifecycle Hooks in Angular? What are the different Lifecycle Hooks in Angular?
Q. What is Real World Example of Angular Lifecycle Hooks?
Q. What is a Constructor in Angular?
Q. What is ngOnChanges life cycle hook in Angular?
Q. What is ngOnInit life cycle hook in Angular?
Q. What is the difference between constructor and ngOnInit?

🔹 Angular Routing

Q. What is Routing? How to use Routing in project?
Q. What is router outlet?
Q. What are router links?
Q. What is Wildcard and Redirect Routing in Angular?
Q. What is Nested Routing in Angular?
Q. What is Lazy Loading in Angular?
Q. What is Route Guards (Auth Guard) in Angular? How to use CanActivate Route Guard?

🔹 Services & Dependency Injection

Q. What is Services explain with Real-World Example?
Q. How to Create Service in Angular?
Q. How to use Dependency Injector with Services in Angular?
Q. What is Hierarchical Dependency Injection?
Q. What is Provider in Angular? Where services can be provided?
Q. What is the role of @Injectable Decorator in a Service?

🔹 Observable / HttpClient / RxJS

Q. What are Asynchronous operations?
Q. What is the difference between Promise and Observable?
Q. What is RxJS? What are the types of operations in RXJS?
Q. What is Observable? How to implement Observable?
Q. What is the role of HttpClient in Angular?
Q. What are the steps for fetching the data with HttpClient & Observable?
Q. How to do HTTP Error Handling in Angular?

🔹 Typescript-Basics and OOPS

Q. What is Typescript? What is the difference between Typescript and JavaScript?
Q. How to install Typescript and check version?
Q. What is the difference between let and var keyword?
Q. What is Type annotation?
Q. What are Built in/ Primitive and User-Defined/ Non-primitive Types in Typescript?
Q. What is any and unknown type in Typescript?
Q. What is Enum type in Typescript?
Q. What is the difference between void and never types in Typescript?
Q. What is Type Assertion in Typescript?
Q. What are Arrow Functions in Typescript?
Q. What is Object Oriented Programming in Typescript?
Q. What are Classes and Objects in Typescript?
Q. What is Constructor?
Q. What are Access Modifiers in Typescript?
Q. What is Encapsulation in Typescript?
Q. What is Inheritance in Typescript?
Q. What is Polymorphism in Typescript?
Q. What is Interface in Typescript?
Q. What's the difference between extends and implements in TypeScript?
Q. Is Multiple Inheritance possible in Typescript?

🔹 Angular Forms

Q. What are Angular Forms? What are the type of Angular Forms?
Q. What is Form Group and Form Control in Angular?
Q. What is Template-Driven Forms in Angular? How to Create a Template-Driven Forms in Angular?
Q. Why do we use ngModel and ngForm in Angular Template-Driven Forms?
Q. What is Reactive Forms in Angular? How to Create a Reactive Forms in Angular?
Q. What is the difference between Template Driven Forms & Reactive Forms?
Q. How to apply Required field validation in template driven forms?
Q. How to do validations in reactive forms?

🔹 Authentication JWT, Auth Guard, HTTP Interceptor

Q. What is Authentication & Authorization in Angular?
Q. What is JWT Token Authentication in Angular?
Q. How to Mock or Fake an API for JWT Authentication?
Q. How to implement the Authentication with JWT in Angular?
Q. What is Auth Guard?
Q. What is HTTP Interceptor?
Q. How to Retry automatically if there is an error response from API?
Q. What are the parts of JWT Token?
Q. What is Postman?
Q. Which part of the request has the token stored when sending to API?

🔹 Angular Components Communication

Q. What are the various ways to Communicate between the Components?
Q. What is Content Projection?
Q. What is Template Reference Variable in Angular?
Q. What is the role of ViewChild in Angular?
Q. How to access the child component from parent component with ViewChild?
Q. What is the difference between ViewChild and ViewChildren? What is QueryList?
Q. What is ContentChild?
Q. What is the difference between ContentChild & ContentChildren?
Q. Compare ng-Content, ViewChild, ViewChildren, ContentChild & ContentChildren?

🔹 Important Questions

Q. What is the difference between Subject and BehaviorSubject in RxJS?
Q. What is the difference between Angular Pure Pipe and Impure Pipe?
Q. What are the Techniques to Improve Angular Performance?
Q. What is the difference between Angular Promise and Observables?
Q. What is the difference between Angular ng serve vs ng build?
Q. What is Difference between Module and Component?

🔹 Practical Examples

Q. How to create Custom Pipes in Angular?
Q. How to Integrate Angular with .NET Web API and SQL Server?
Q. How to create Angular CRUD Example?

Student Reviews

What learners say about this Interview Pack

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Software Engineer

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200+ Angular Interview Question Pack

200+ Angular Interview Question Pack

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Course Structure

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