React Online Test

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About the test

The React online test assesses knowledge of building web user interfaces with the React/ReactJS library through a series of live coding questions.

The assessment includes work-sample tasks such as:

  • Creating reusable Components.
  • Working with Hooks to access state and other React features.
  • Handling user events and updating the application based on user actions.

A good React/ReactJS developer should be able to work with the library effectively to create maintainable and accessible web user interfaces.

Sample public questions

Easy
15 min
code
Public
AI-resistant
React
Arithmetic
Forms
React Hooks
State Hook
Video
New

A megastore offers three types of discounts. The store needs a way to calculate these discounts quickly.

Implement the PriceCalculator component which should take the total weight of the shopping cart, the total price, and the discount type. It should display the final discounted price based on the discount schemes as the input changes. 

The discounts are shown in the promotional video below:

(Open full-size video in a new tab)

For example, when the discount type is weight, the weight of the cart is 12 and the price is 100, the discounted price is 82, as show in the screenshot below:

discount price screenshot

Hard
20 min
code
Public
AI-resistant
React
Bug Fixing
Data Binding
React Hooks
State Hook
Video
New

An RPG game lets you assign points to the strength and speed attributes of your character in order to improve. The video below shows how 15 points are supposed to be assigned.

The available points are passed in the totalPoints prop.

Fix the CharacterAttributes component so that it behaves as shown in the video. When initialized, all points should be available, and both sliders should start at 0.

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27 more premium React questions

Error Catcher, Tooltip Component, Reorder, List Wrapper, Toggle Options Visibility, Subscription, Simple Calculator, Shopping List, Product Rating, Tab Strip, Details, Contact Form, Post Comment, Login Form, Product Search, Pet Form, Async Paragraph, Click Button, Cards Widget, Theme Context Switcher, Player Status, Feedback Form, Factory Status, Email Input, Choose Items, Tally Counter, Habit Chart.

Skills and topics tested

  • React
  • Components
  • Error Boundaries
  • Portals
  • Event Handling
  • React Hooks
  • Higher Order Components
  • Data Binding
  • Conditional Rendering
  • State Hook
  • Reducer Hook
  • Managing State
  • Content Manipulation
  • Hooks
  • Effect Hook
  • Forms
  • Asynchronous Calls
  • React Context
  • Video

For job roles

  • JavaScript Developer
  • React Developer
  • Web Front-End Developer

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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.

Jan Opperman, Grindrod Bank

Product reviews

G2 - Crowd Badge
G2 - High Performer - Winter (2025)
Capterra - 4.5 Stars
Capterra - Shortlist (2023)

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