React Redux Online Test

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About the test

The React Redux online test uses live coding tasks to assess the skills required to build front-end applications with React and manage the application’s state with the Redux Toolkit.

The assessment involves solving work sample tasks such as:

  • Creating reusable Components.
  • Handling user events and updating the application based on user actions.
  • Creating a store, reducers, and dispatching actions in Redux Toolkit.

A good React developer using the Redux Toolkit needs a solid understanding of both libraries to build and maintain complex front-end applications.

Sample public questions

10 min
Conditional Rendering
Event Handling
Managing State

The Message component contains an anchor element and a paragraph below the anchor. Rendering of the paragraph should be toggled by clicking on the anchor element using the following logic:

  • At the start, the paragraph should not be rendered.
  • After a click, the paragraph should be rendered.
  • After another click, the paragraph should not be rendered.

Finish the Message component by implementing this logic.

5 min
Redux Toolkit
Redux Actions
Redux Reducer
Redux Store

 Consider the following Redux reducer defined to manage a wish list:

const wishListReducer = createReducer(initialState, (builder) => {
    .addCase(removeItem, (state, action) => {
      state.wishList = state.wishList.filter((item => item !== action.payload))
    .addCase(addItem, (state, action) => {
      if(state.wishList.length < 10) {
    .addDefaultCase((state, action) => {});

const store = configureStore({
  reducer: {
    cart: wishListReducer,

The initial wish list:

const initialState = {
  wishList: [
    "Toy Car",

Considering the initalState and wishListReducer defined above, what is true about wishListReducer?

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25 more premium React Redux questions

Error Catcher, Click Button, Email Input, Login Form, Product Search, Pet Form, Details, Music Playlist, Fruit Cart, List Wrapper, Email Form, Shopping List, Toggle Options Visibility, Product Rating, Cards Widget, Tooltip Component, Contact Form, Reorder, Player Status, Theme Context Switcher, Subscription, Post Comment, Tab Strip, Simple Calculator, Async Paragraph.

Skills and topics tested

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

For job roles

  • React Developer
  • Redux Toolkit 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 (2022)

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