Infosys Angular interview questions

Preparing for Infosys Angular interview is a great way for you to get a job at Infosys. If you are looking for interview questions that will help you get prepared for your interview, then you have reached the right page! Here we’ll explore Infosys as a great place to work, share preparation tips, and cover commonly asked Infosys Angular interview questions to help you succeed.

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Introduction

Angular is one of the most widely used front-end frameworks, and Infosys, a global leader in IT services, frequently seeks skilled Angular developers. If you’re preparing for an Angular interview at Infosys, this guide provides an in-depth look into the interview process, commonly asked questions, and best practices to help you succeed.

Understanding the Interview Process at Infosys

The Infosys Angular interview process generally consists of the following rounds:

1. Online Assessment (Technical Aptitude) – Tests programming logic, problem-solving ability, and basic Angular knowledge.
2. Technical Interview – Focuses on Angular concepts, JavaScript, TypeScript, and project-based discussions.
3. HR Interview – Evaluates communication skills, company culture fit, and career aspirations.

Angular Interview Questions for Infosys

Below are some frequently asked Angular interview questions along with answers:

Basic Level Questions

Q1. What is Angular?

• Angular is a TypeScript-based open-source web application framework developed by Google. It helps build dynamic, single-page applications (SPAs) with a component-based architecture.

Q2. What are the key features of Angular?

• Component-based architecture
• Dependency injection
• Directives and templates
• Two-way data binding
• Routing and navigation
• Lazy loading
• RxJS for reactive programming

Q3. What is the difference between AngularJS and Angular?

• AngularJS (version 1.x) is based on JavaScript, while Angular (2+) uses TypeScript.
• Angular provides better performance with Ahead-of-Time (AOT) compilation.
• AngularJS follows MVC architecture, whereas Angular follows a component-based architecture.

Q4. Explain data binding in Angular.

• Data binding synchronizes data between the model and the view.
• Types of data binding in Angular:
  • Interpolation: {{ expression }}
  • Property Binding: [property]="expression"
  • Event Binding: (event)="method()"
  • Two-way Binding: [(ngModel)]="expression"

Intermediate Level Questions

Q5. What are Angular directives? Name some types.

• Directives are used to extend HTML functionality.
• Types:
  • Structural Directives: *ngIf, *ngFor, *ngSwitch
  • Attribute Directives: ngClass, ngStyle
  • Custom Directives: User-defined directives

Q6. What is Dependency Injection (DI) in Angular?

• Dependency Injection is a design pattern used to pass dependencies to components and services instead of hardcoding them.
• Angular’s DI framework allows efficient and modular coding.

Q7. What are Services in Angular?

• Services are singleton objects used to share data and logic across components.
• Created using @Injectable() decorator.
• Example:

import { Injectable } from ‘@angular/core’;

@Injectable({
providedIn: ‘root’
})
export class DataService {
getData() {
return [‘Angular’, ‘React’, ‘Vue’];
}
}

Q8. What is RxJS and why is it used in Angular?

• RxJS (Reactive Extensions for JavaScript) is a library for reactive programming using Observables.
• It helps manage asynchronous data streams efficiently.
• Used with HTTP calls, event handling, and reactive forms.

Advanced Level Questions

Q9. Explain Lazy Loading in Angular.

• Lazy loading loads feature modules on demand instead of at startup.
• Reduces the initial bundle size, improving application performance.
• Implemented using loadChildren in app-routing.module.ts.
• Example:

{ path: ‘dashboard’, loadChildren: () => import(‘./dashboard/dashboard.module’).then(m =>m.DashboardModule) }

Q10. What are Angular Pipes? How do you create a custom pipe?

• Pipes transform data in templates.
• Example: {{ price | currency }}
• Custom Pipe:

import { Pipe, PipeTransform } from ‘@angular/core’;

@Pipe({
name: ‘customPipe’
})
export class CustomPipe implements PipeTransform {
transform(value: string): string {
return value.toUpperCase();
}
}

Q11. What are Guards in Angular?

• Guards control access to routes based on conditions.
• Types:
  • CanActivate: Checks before activating a route.
  • CanDeactivate: Checks before leaving a route.
  • Resolve: Fetches data before route activation.
  • CanLoad: Prevents module loading if conditions aren’t met.

Q12. What is Change Detection in Angular?

• Change Detection updates the view whenever data changes.
• Two strategies:
  • Default: Checks all components.
  • OnPush: Checks only components with changed inputs.

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Tips & Best Practices for Angular Interviews at Infosys

To increase your chances of success in an Infosys Angular interview, follow these key tips:

a. Master Angular Fundamentals

• Understand core Angular concepts like components, directives, services, and dependency injection.
• Be clear on TypeScript, as it’s widely used in Angular.

b. Practice Real-World Coding Problems

• Work on small Angular projects to gain hands-on experience.
• Solve problems on data binding, routing, and forms handling.

c. Learn Common Design Patterns & Best Practices

• Use Lazy Loading for better performance.
• Follow Modular Architecture in your Angular projects.

d. Stay Updated with the Latest Angular Versions

• Infosys may ask about new Angular features introduced in the latest versions.
• Explore official Angular documentation and community forums.

e. Mock Interviews & Time Management

• Practice mock interviews to get comfortable with technical discussions.
• Explain your thought process clearly while coding.

f. Be Ready for Conceptual & Hands-On Coding Questions

• Prepare for both theoretical questions and coding challenges in Angular.
• Brush up on JavaScript, TypeScript, and RxJS for better problem-solving.

Conclusion

Preparing for an Angular interview at Infosys requires a strong grasp of fundamental and advanced concepts. By practicing these questions, improving your coding skills, and following best practices, you can increase your chances of success. Keep learning and refining your skills to stay ahead in your career!

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