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Angular Interview Questions

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Need to practice your Angular skills for an upcoming job interview? Try solving these Angular interview questions that test knowledge of Angular components and expressions. We’ll provide feedback on your answers, and you can use a hint if you get stuck.

These Angular interview questions are examples of real tasks used by employers to screen candidates for front-end web development jobs that require knowledge of the Angular framework in order to create robust, scalable, and user-friendly web applications.

1. Component

Angular Components Public
   
Easy  

Which of the following statements about components in Angular are correct?

(Select all acceptable answers.)


2. Welcome

Angular Components Public
   
Easy  

Consider the following component:

import { Component, Input } from '@angular/core';

@Component({
  selector: 'welcome',
  template: `<h1>Welcome to {{name}}!</h1>`,
  styles: [`h1 { font-family: Lato; }`]
})
export class WelcomeComponent  {
  @Input() name: string;
}

Select the statements about its use (in another components template or module) that are correct.

(Select all acceptable answers.)


3. Animal Noise

Angular Expressions Public
   
Easy  

Consider the following component, which can be used to model an animal and the noise it makes.

import {Component, Input, Output} from '@angular/core';

@Component({
  selector: 'animal-noise',
  template: `
    <span>{{animal}}</span>
    <button (click)="makeNoise()">Make noise</button>
  `
})
export class AnimalNoise {
  @Input('animal') animal: string;
  @Input('noise') noise: string;

  makeNoise() {
    alert(`${this.noise}`);
  }
}

Select the statements about the AnimalNoise component that are correct.

(Select all acceptable answers.)


4. Shopping Component

Angular Components Directives One-way binding New Public
   
Easy  

Finish the ShoppingList component. The component will receive an array of strings as the items array. It should render one li element per item in the array.

For example, if the items array is ["Bread", "Eggs", "Milk"], the rendered HTML should look like:

<ul>
  <li>Bread</li>
  <li>Eggs</li>
  <li>Milk</li>
</ul>

The code for running the example case locally is provided here.


5. Address Template

Angular Components Directives New Public
   
Easy  

Finish the AddressListComponent's template so that it renders one li element per address and it correctly one-way binds each field of the AddressComponent field.

For example, if the addresses array is:

[{ street: "Third Avenue‎", city: "New York", zipCode: "10001" },
 { street: "Constitution Avenue", city: "Washington", zipCode: "20001" }]

the template should render to:

<ul>
  <li>
    <app-address>
      <p>Third Avenue</p>
      <p>New York</p>
      <p>10001</p>
    </app-address>
  </li>
  <li>
    <app-address>
      <p>Constitution Avenue</p>
      <p>Washington</p>
      <p>20001</p>
    </app-address>
  </li>
</ul>

The code for running the example case locally is provided here


6. Router Module

Angular HTTP Routing Public
   
Hard  

Consider the following application module:

import { NgModule }             from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import { HomeComponent }        from './home.component';
import { ItemDetailComponent }  from './item-detail.component';
const routes: Routes = [
    { path: '', redirectTo: '/home', pathMatch: 'full' },
    { path: 'home',  component: HomeComponent },
    { path: 'detail/:id', component: ItemDetailComponent, outlet: 'route1' }
];
@NgModule({
    imports: [ RouterModule.forRoot(routes) ],
    exports: [ RouterModule ]
})
export class AppRoutingModule {}

Which of the following statements about the routers behavior are correct?

(Select all acceptable answers.)


7. Image Gallery App

Angular Components Directives Event Binding Event handling One-way binding New Public
   
Hard  

An image gallery is a set of images with corresponding remove buttons. This is the HTML code for a gallery with two images:

<div>
  <div class="image">
    <img src="https://goo.gl/kjzfbE">
    <button class="remove">X</button>
  </div>
  <div class="image">
    <img src="https://goo.gl/d2JncW">
    <button class="remove">X</button>
  </div>
</div>

Implement the ImageGallery component that accepts a links input and renders the gallery described above so that the first item in the links input is the src attribute of the first image in the gallery. It should also implement the following logic: When the button is clicked, the image that is in the same div as the button should be removed from the gallery.

For example, after the first image has been removed from the gallery above, it's HTML code should look like this:

<div>
  <div class="image">
    <img src="https://goo.gl/d2JncW">
    <button class="remove">X</button>
  </div>
</div>

The code for running the example case locally is provided here.


If you feel ready, take one of our timed public Angular Interview Questions tests:
Angular

Angular Online Test (Easy / Hard)

Angular and TypeScript Online Test (Easy / Hard)

HTML/CSS

HTML/CSS, Angular, TypeScript, and Node.js Online Test (Easy / Hard)

HTML/CSS, Angular, TypeScript, Node.js, and SQL Online Test (Easy / Hard)

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