Angular and RxJS Online Test

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About the test

The Angular and RxJS online test evaluates a candidate’s knowledge of the Angular front-end web framework and reactive programming with RxJS.

It is an ideal test for pre-employment screening. A good Angular developer should have an in-depth understanding of Angular components and should be able to use that knowledge to create robust, scalable, and user-friendly web applications, as well as use RxJS to implement asynchronous and event-driven features.

The online test requires candidates to answer multiple choice, fill-in-the-blank, and coding questions about Angular and RxJS.

Sample public questions

5 min
One-Way Binding

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:


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

7 min
Creation Operator
Pipeable Operator
RxJS Observable
RxJS Subject

Consider the following RxJS code for testing how a given damage Subject affects the health of a Player object in a game:

class Player {
  name: string;
  health: number;
  damageSubscription: Subscription;

  constructor(name, damageSubject) { = name; = 100;
    this.damageSubscription = damageSubject.subscribe((damage) => { -= damage;
      console.log( + " was hurt for " + damage + " damage");

  takeCover() {
        takeWhile(() => < 100),
        map(() => 10),
        tap(() => console.log( + " is healing, current health is " +
      .subscribe((heal) => { += heal;
const explosion = new Subject();
const john = new Player("John", explosion);
const sam = new Player("Sam", explosion);;

const paul = new Player("Paul", explosion);

What options will be true after the above code is run?

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22 more premium Angular and RxJS questions

Awesome Tracking, Fresh Food, Log Post Data, Clothes, Dictionary Definition, Cards Widget, Cats and Dogs, Movie Details, Structural Directive, Dark Mode, Optional Ingredient, Upgrades, Observing Username, User Form, Count Binding, Decimal Pipe, Single Input, Currency Format, Report Summary, Toggle Border, Delivery Details, Weather Form.

Skills and topics tested

  • RxJS
  • Bug Fixing
  • Pipeable Operator
  • RxJS Observable
  • RxJS Subject
  • Angular
  • Components
  • Creation Operator
  • Directives
  • Event Binding
  • Event Handling
  • One-Way Binding
  • Services
  • HTTP Routing
  • Structural Directive
  • Forms
  • Two-Way Binding
  • Expressions
  • Angular Pipes
  • Data Binding

For job roles

  • Angular Developer
  • RxJS Developer

Sample candidate report

What others say

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Simple, straight-forward technical testing

TestDome is simple, provides a reasonable (though not extensive) battery of tests to choose from, and doesn't take the candidate an inordinate amount of time. It also simulates working pressure with the time limits.

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Product reviews

G2 - Crowd Badge
G2 - High Performer (2022)
Capterra - 4.5 Stars
Capterra - Shortlist (2023)

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