React Online Test
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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
Finish the FocusableInput component so that the input element automatically receives focus on the first render if the shouldFocus prop is true.
An RPG game lets you assign points to various attributes of your character to improve it. The points earned by the character are available to assign across all attributes. Each attribute can only be assigned at most 70% of totalPoints (rounded down to the nearest integer) unless totalPoints is 1, in which case only one attribute can get a maximum of 1 point. The sum of all points assigned plus the points remaining should add up to totalPoints.
Implement the CharacterAttributes component with the logic described above and the following requirements:
- Points should be assigned by moving the slider and the remaining points should be displayed in the span tag.
- When initialized, all points are available and all sliders start at 0.
- Each slider must have a range from 0 up to totalPoints.
For example, if totalPoints is 15 then the user shouldn't be able to drag the slider past 10 even if more points are available.
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25 more premium React questions
Error Catcher, Tooltip Component, Reorder, List Wrapper, Toggle Options Visibility, Subscription, Simple Calculator, Shopping List, Product Rating, Tab Strip, Details, Email Input, Contact Form, Post Comment, Login Form, Product Search, Pet Form, Async Paragraph, Click Button, Cards Widget, Theme Context Switcher, Player Status, Feedback Form, Habit Chart, Factory Status.
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
- RAID
- Content Manipulation
- Hooks
- Effect Hook
- Forms
- Asynchronous Calls
- React Context
- Video
For job roles
- JavaScript Developer
- React Developer
- Web Front-End Developer
Sample candidate report
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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
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