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?

402

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

391

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

427

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

448

How events are different in react?

434

What is react intl?

601

What are the three principles that redux follows?

396

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

373

What is the significance of keys in react?

551

What are pure components?

348

What is arrow function in react?

434

How react router is different from history library?

507

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

372

Differentiate between stateful and stateless components?

371

What were the major problems with mvc framework?

473

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Un-Answered Questions { React.js }

What is the difference between shadow dom and virtual dom?

477

What is Context in React?

366

What is the difference between using constructor vs getInitialState in React?

466

How can you embed two or more components into one?

364

Explain the lifecycle methods of react components in detail?

418

How events are different in react?

434

What are the lifecycle steps of React?

445

Explain the use of ‘key’ in react list

418

Does React re-render all components and sub components every time setState is called?

430

What is lazy loading react?

408

What is shouldcomponentupdate and when is used in react.js?

408

What is the difference between states and props.

400

What is the significance of store in redux?

398

What is the use of empty tags <> ?

389

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

391

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