React.js Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

React.js Interview Questions

Questions Answers Views Company eMail

What is an event in react?

363

What are the lifecycle methods going to be deprecated in react v16?

357

How do you tell react to build in production mode and what will that do?

376

How to use https instead of http in create-react-app?

397

How events are different in react?

390

What is react intl?

531

What are the three principles that redux follows?

353

What do you understand by “single source of truth”?

333

What is the significance of keys in react?

481

What are pure components?

301

What is arrow function in react?

390

How react router is different from history library?

444

Is it possible to use async/await in plain react?

341

Differentiate between stateful and stateless components?

332

What were the major problems with mvc framework?

433

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Un-Answered Questions { React.js }

What is controllable component in reactjs?

356

What do you understand by virtual dom?

328

Explain strict mode

323

How different is react’s es6 syntax when compared to es5?

403

Why is react better?

301

What is the ‘Store’ feature in Redux?

322

What do you understand by refs in react?

330

Explain the term high order component

324

How to pass a parameter to an event handler or callback?

382

What is a state in reactjs and how is it used?

356

What is ReactDOM and what is the difference between ReactDOM and React?

427

What can you do if the expression contains more than one line?

316

What is the difference between a Presentational component and a Container component?

362

What is the difference between state and props in react js?

407

What do you understand from “in react, everything is a component.”

347

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