React js interview questions

React is the most popular frontend library of framework right now and if it keeps evolving often.

It has some many tricks under the hood that even experienced professionals fails at interviews.

In this set we have curated list of react js interview questions and answers which are differentiated topic wise. Each question will have its topic’s tag and difficulty label.

//1
render() {
  return false
}

//2
render() {
  return null
}

//3
render() {
  return []
}

//4
render() {
  return <React.Fragment></React.Fragment>
}

//5
render() {
  return <></>
}

import React, {Component} from 'react';

const data = { name: 'Prashant', age: 24 }

class App extends Component {
  render() {
    return (
      <pre>
        {JSON.stringify(data, null, 2)}
      </pre>
    )
  }
}

export default App;