React Online Test
For Jobseekers
Practice your skills and earn a certificate of achievement when you score in the top 25%.
Take a Practice TestFor Companies
Test candidates with real-world problems and interview the best ones.
Sign Up to Offer this TestAbout 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
You have a GroceryApp component, which receives a list of products, each one with name and votes. The app should render an unordered list, with a list item for each product. Products can be upvoted or downvoted.
By appropriately using React state and props, implement the upvote/downvote logic. Keep the state in the topmost component, while the Product component should accept props.
For example, passing the following array as products prop to GroceryApp [{ name: "Oranges", votes: 0 }, { name: "Bananas", votes: 0 }] and clicking the '+' button next to the Oranges should result in HTML like:
<div id="root">
<ul>
<li>
<span>Oranges</span> - <span>votes: 1</span><button>+</button> <button>-</button>
</li>
<li>
<span>Bananas</span> - <span>votes: 0</span><button>+</button> <button>-</button>
</li>
</ul>
</div>
Finish the FocusableInput component so that the input element automatically receives focus on the first render if the shouldFocus prop is true.
The component should use React Hooks.
For jobseekers: get certified
Earn a free certificate by achieving top 25% on the React test with public questions.
Take a Certification TestSample silver certificate
Sunshine Caprio
Java and SQL TestDomeCertificate
For companies: premium questions
Buy TestDome to access premium questions that can't be practiced.
Get money back if you find any premium question answered online.
23 more premium React questions
Error Catcher, Login Form, Product Search, Pet Form, Simple Calculator, Tooltip Component, Reorder, Player Status, Subscription, Post Comment, Shopping List, Cards Widget, List Wrapper, Async Paragraph, Contact Form, Theme Context Switcher, Email Form, Tab Strip, Toggle Options Visibility, Email Input, Details, Product Rating, Click Button.
Skills and topics tested
- React
- Components
- Error Boundaries
- Hooks
- State Hook
- Effect Hook
- Forms
- React Hooks
- Reducer Hook
- Portals
- Event Handling
- Conditional Rendering
- Content Manipulation
- Managing State
- Higher Order Components
- Asynchronous Calls
- Context
- Data Binding
For job roles
- JavaScript Developer
- React Developer
- Web Front-End Developer
Sample candidate report
What others say
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
Used by
Solve all your skill testing needs
150+ Pre-made tests
From web development and database administration to project management and customer support. See all pre-made tests.
90+ skills
From JavaScript and SQL to English and customer support. See all questions to filter by skill.
Multi-skills Test
Mix questions for different skills or even custom questions in one test. See an example.
How TestDome works
Choose a pre-made test
or create a custom test
Invite candidates via
email, URL, or your ATS
Candidates take
a test remotely
Sort candidates and
get individual reports