Angular 2 interview questions

Angular JS is the technology, which handles the downfalls of HTML. We at Remittance Sol come up with the Angular 2 interview questions that help you to crack the interview in the first attempt. It gives you confidence and you can now apply for the job free from any worries. We here help you to prepare for the interview and it’s time to go through the questions that gives you a clear idea of how the interview is going to happen. We are here to give you full guidance that helps you to join the dream job achieving ultimate success.

Why choose us?

Our Angular 2 interview questions are the ideal options and are prepared after detailed research by the experts. Once you study our questions, we can assure you that you can handle the interview at your ease. We help you to learn how to face the interview and you can now get rid of all confusions. It’s time to explore the solutions and you can now comprehend the real benefits of the questions we publish.

Once you complete solving the questions you can sit for the interview knowing that you are the one who would get the job. Thus, you can now make your dreams come true and we are here to take care of all your needs.

A Brief View of the Features

Here are mentioned a brief view of the features and we analyze all the thigs to frame the questions in the right way:

We study the javascript MVW framework coming up with the ideal questions

Next, we frame questions on data binding

We here also frame questions on engine routing and we help you to know the importance of built-in templates

It’s important to know about form validations and animations and it gives you the confidence to attend the interview

It’s important to know that Angular 2 framework works faster. It supports web, mobile as well as desktop apps. So, you can now use the features in your way comprehending the usability of the framework. And while you are preparing for the interview it’s important to learn why to use Angular 2 and thus you can now comprehend the benefits of the technologies in the modern days. We here give you an idea of how to face the interviewer and thus you can now get rid of all the worries knowing that you can join your dream job.

Time to Start Preparing

It’s time to start preparing for the interview and we ensure that you can now explore life in a new way. Simply, you study our Angular 2 interview questions and we ensure that you can get familiar with all positive aspects. Our experts know how to frame the questions and thus you can now give life a new start. We show you a new world and you can now explore a great profession that makes you feel happier. It’s time to start making job applications and we help you to handle the interview confidently.

Q. 1. What are the key components of Angular 2?

Template – use this word to represent the connection for the application. It contains the HTML to be rendered in the application. This section also contains the binding and guidelines.

Class – It is like a class defined in any language like C. It contains properties and methods. It contains the code used to support the connection. It is defined in TypeScript.

Metadata – here the extra data is defined for the angle class. It is defined with a decorator

Q. 2. What is CLI?

CLI is the acronym for Command Line Interface, which can be used to create the Angular JS application. With CLI, you can also create unit and end-to-end testing for the Angular application.

Q. 3. Define the role of a decorator in Angular 2?

Decorators basically change the definitions of classes or property. These are also referred to as annotations and are JS features. In Angular, these decorators include some metadata for classes and attributes to convey what they mean and how it’s supposed to function.

Take a look at the code below:

// Code Starts

import { BrowserModule } from ‘@angular/platform-browser’;

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

import { FormsModule } from ‘@angular/forms’;

import { AppComponent } from ‘./app.component’;

@NgModule({

declarations: [

AppComponent

],

imports: [

BrowserModule,

FormsModule,

],

providers: [],

b…

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Q. 4. What do you mean by a structural directive in Angular 2?

Structural guidelines are responsible for the HTML layout. It forms or forms the structure of the DOM, typically by adding, removing, or manipulating elements. As with other instructions, you apply a structural directive to a host element.

Q. 5. What is Angular2?

Angular 2 is component-based. Components combine concepts we are already familiar with from AngularJS. The Angular 2 component combines the AngularJS directive, controller, and scope. My article will try to make you more comfortable with components by comparing them to what you already know about AngularJS.

Q. 6. What’s an Angular 2 directive?

Angular shape templates are dynamic. If Angular reproduces it, it transforms the DOM according to the instructions given by the guidelines. An assignment is a class with an @Directive () decorator.

Q. 7. What is a template in Angular 2?

Angular 2 templating system gives us a syntax to express the dynamic part of our HTML.

In Angular 2, a component needs to have a view. To define a view, you can define a template inline (using template) or in a separate file (using templateUrl).

Q. 8. Why are decorators used in Angular 2?

Decorators are functions that are used with an advanced @ symbol, and are immediately followed by a class, parameter, method, or attribute. The decoration function provides information about the class, parameter or method, and the decoration function returns something in its place, or manipulates the target in some way.

Q. 9. How will you handle errors in Angular 2 applications?

There are basically two ways to handle errors in Angular application

Try Catch

To catch synchronous exceptions in the code, we can add a try/catch block. If an error is thrown inside try then we catch it and handle it.

1. try {
2. ………
3. code
4. ………
5. }
6. catch (error) {
7. console.error(error);
8. }

ErrorHandler Hook

Angular provides a hook for centralized exception handling with ErrorHandler. The default implementation of ErrorHandler prints error messages to the console.

code :

1. import { ErrorHandler } from ‘@angular/core’;
2.  
3. @Injectable()
4. export class GlobalErrorHandler implements ErrorHandler {
5.  
6. handleError(error) {
7. // your custom error handling logic
8. }
9. }

Then, we provide it in our root module to change default behavior in our application. Instead of using the default ErrorHandler class we are using our class.

1. @NgModule({
2. providers: [{provide: ErrorHandler, useClass: GlobalErrorHandler}]
3. })

Q. 10. What are the advantages of Angular 2 over Angular 1?

1. It is entirely component based.

2. Better change detection

3. Angular2 has better performance.

4. Angular2 has more powerful template system.

5. Angular2 provide simpler APIs, lazy loading and easier to application debugging.

6. Angular2 much more testable

7. Angular2 provides to nested level components.

8. Ahead of Time compilation (AOT) improves rendering speed

9. Angular2 execute run more than two programs at the same time.

10. Angular1 is controllers and $scope based but Angular2 is component based.

11. The Angular2 structural directives syntax is changed like ng-repeat is replaced with *ngFor etc.

12. In Angular2, local variables are defined using prefix (#) hash. You can see the below *ngFor loop Example.

13. Typescript can be used for developing Angular 2 applications

14. Better syntax and application structure

Q. 11. What are the differences between Angular2 and ReactJS?

Angular2

During Angular 2 development, its second version got rid of unnecessary complexity that was present in the previous one. For example, the Angular 2 team has removed or replaced nearly all the concepts from the first version. I am talking about modules, controllers, scopes, directives, etc.

ReactJS

Unlike Angular, ReactJS is a JavaScript-based open-source librarywith a JSX compiler. It is mainly focused on the user interface allowing to create reusable UI views components.

Using React you should always remember that it is not one more MVC framework but just a library for rendering your views. This way, React is an interface-focused solution since your users get a highly responsive interface with smooth loading.