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

Easy
7 min
code
Public
React
Effect Hook
React Hooks
Reference Hook

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.

Easy
5 min
mca
Public
Redux Toolkit
Redux Store
Thunk

A web application for a meteorologist's dashboard uses a Redux store to manage temperature data. The Redux store is configured with the Redux toolkit where the latest temperature data is fetched using the Redux thunk function.

Below is the code for the store's configuration:

const weatherURL = "http://example.com/temperaturejson";

const fetchTemperature = createAsyncThunk(
  "weather/fetchTemperature",
  async (arg, thunkAPI) => {
    const response = await fetch(weatherURL);
    return response.json();
  }
);

const temperatureSlice = createSlice({
  name: "temperature",
  initialState: { temperature: 0 },
  reducers: {},
  extraReducers: (builder) => {
    builder.addCase(fetchTemperature.fulfilled, (state, action) => {
      state.temperature = action.payload.temperature;
    });
    builder.addCase(fetchTemperature.pending, (state, action) => {
      state.temperature = "loading";
    });
    builder.addCase(fetchTemperature.rejected, (state, action) => {
      console.log(action);
      state.temperature = "unavailable";
    });
  },
});

const weatherStore = configureStore({ reducer: temperatureSlice.reducer });

What is true about the behavior of weatherStore?

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25 more premium React Redux questions

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

Skills and topics tested

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

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 High Performer 2022G2 Read Our Reviews

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