ReactJS

Live Test

ReactJS

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Experience Required

3-5 years

Test Duration

20 min

Test Format

Audio + Video

Summary of the test

An intermediate React Frameworks professional with 3-6 years experience, adept at building both functional and class components with a solid grasp of core React concepts. Skilled in state management, custom hooks, routing, and form validations to create reusable, efficient code and integrate external services. Experienced in API integration, responsive styling.

Skills Checked:

React Core Concepts
Component Lifecycle Methods
State Management Libraries
Custom Hooks Usage
API Integration Techniques
Unit Testing Strategies

Companies recruiting for this skill:

Every Utkrusht test shows the candidate a real code challenge that they will

face during their job and observes their ability to:

find faults, suggest improvements, etc.

Sample Questions:

Examine the following code of a Server-Side Rendering (SSR) Next.js application handling real-time updates via WebSockets. Identify potential performance bottlenecks and discuss strategies to optimize rehydration and server load handling.
import { useEffect, useState } from 'react'; import io from 'socket.io-client'; function Page() { const [data, setData] = useState(null); const [socket] = useState(() => io()); useEffect(() => { socket.on('update', newData => { setData(prevData => ({ ...prevData, ...newData })); }); return () => socket.disconnect(); }, [socket]); return <div>{data ? JSON.stringify(data) : 'Loading...'}</div>; } export default Page;
Take the test

You have a React component with the following implementation for fetching data:

import React, { useState, useEffect } from 'react';
import axios from 'axios';

function DataFetcher() {
  const [data, setData] = useState(null);

  useEffect(() => {
    axios.get('/api/data')
      .then(response => setData(response.data));
  }, []);

  return <div>{JSON.stringify(data)}</div>;
}

Discuss any safety concerns or potential inefficiencies in this implementation and how you would address them.

Take the test

You have a React component with the following implementation for fetching data:

import React, { useState, useEffect } from 'react';
import axios from 'axios';

function DataFetcher() {
  const [data, setData] = useState(null);

  useEffect(() => {
    axios.get('/api/data')
      .then(response => setData(response.data));
  }, []);

  return <div>{JSON.stringify(data)}</div>;
}

Discuss any safety concerns or potential inefficiencies in this implementation and how you would address them.

Take the test

Examine the following code of a Server-Side Rendering (SSR) Next.js application handling real-time updates via WebSockets. Identify potential performance bottlenecks and discuss strategies to optimize rehydration and server load handling.

import { useEffect, useState } from 'react';
import io from 'socket.io-client';

function Page() {
    const [data, setData] = useState(null);
    const [socket] = useState(() => io());

    useEffect(() => {
        socket.on('update', newData => {
            setData(prevData => ({ ...prevData, ...newData }));
        });
        return () => socket.disconnect();
    }, [socket]);

    return <div>{data ? JSON.stringify(data) : 'Loading...'}</div>;
}

export default Page;

You have a React component with the following implementation for fetching data:

import React, { useState, useEffect } from 'react';
import axios from 'axios';

function DataFetcher() {
  const [data, setData] = useState(null);

  useEffect(() => {
    axios.get('/api/data')
      .then(response => setData(response.data));
  }, []);

  return <div>{JSON.stringify(data)}</div>;
}

Discuss any safety concerns or potential inefficiencies in this implementation and how you would address them.

Take the test

You have a React component with the following implementation for fetching data:

import React, { useState, useEffect } from 'react';
import axios from 'axios';

function DataFetcher() {
  const [data, setData] = useState(null);

  useEffect(() => {
    axios.get('/api/data')
      .then(response => setData(response.data));
  }, []);

  return <div>{JSON.stringify(data)}</div>;
}

Discuss any safety concerns or potential inefficiencies in this implementation and how you would address them.

Take the test

Know more about the test

What kind of questions are asked in the challenge?

What are tracks?

Can I see a full list of startups who hire from your challenge?

How is Utkrusht different from other screening or skill assessment platforms?

How do you evaluate candidates better than what we currently do?

What do I actually get in the shortlist?

What skills or roles can you assess?

Will this replace my recruiters or team’s hiring process?

Won't candidates "cheat" or do chatgpt?

What if no candidate is good enough?

What if I have candidates but I want to get them tested with your assessments?

What kind of questions are asked in the challenge?

What are tracks?

Can I see a full list of startups who hire from your challenge?

How is Utkrusht different from other screening or skill assessment platforms?

How do you evaluate candidates better than what we currently do?

What do I actually get in the shortlist?

What skills or roles can you assess?

Will this replace my recruiters or team’s hiring process?

Won't candidates "cheat" or do chatgpt?

What if no candidate is good enough?

What if I have candidates but I want to get them tested with your assessments?

What kind of questions are asked in the challenge?

What are tracks?

Can I see a full list of startups who hire from your challenge?

How is Utkrusht different from other screening or skill assessment platforms?

How do you evaluate candidates better than what we currently do?

What do I actually get in the shortlist?

What skills or roles can you assess?

Will this replace my recruiters or team’s hiring process?

Won't candidates "cheat" or do chatgpt?

What if no candidate is good enough?

What if I have candidates but I want to get them tested with your assessments?

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Assessment library

ReactJS

Sample Questions:

Sample Questions:

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