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 high-level component lifecycle in react.js?

468

What are state and props in reactjs? What is the difference between the two? Give a proper example of using state and props to elaborate the concept with complete source code?

406

What is the difference between setstate() and forceupdate()?

375

What are pure functional components?

384

What is the difference between angularjs vs react.js?

484

What is the difference between an element and a component in react?

432

How to use events in reactjs? Give an example of using events?

472

Can you explain about the standard javascript toolchain, transpilation, jsx?

359

How to apply validation on props in reactjs? Apply validation in previously developed example in above question?

376

What is reactjs-jsx? What are the advantages of using jsx?

401

What is the difference between react components in es5 and es6?

391

How would you create higher order components (hocs) in react.js?

360

Explain about the standard javascript toolchain, transpilation, jsx?

368

What is the significance of refs in react?

367

What is flux in react.js?

455

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Un-Answered Questions { React.js }

Explain the major advantages of react.

371

Is it possible to use the word class in jsx?

320

What is lifting state up in react?

376

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

457

What are the differentiate between stateful and stateless components?

439

Is it possible in React to call the Child method from Parent?

397

How are forms created in react?

395

What is the difference between super() and super(props)?

448

What is lazy loading react?

405

Can a developer create animations in React?

412

Explain life cycle of react js component?

346

What is flux?

360

Explain the term ‘Restructuring.’

347

How do you pass data from child to parent component?

419

Is it possible to nest jsx elements into other jsx elements?

367

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