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

React.js Interview Questions

Questions Answers Views Company eMail

When would you use a class component over a functional component?

428

What is props?

418

What are the popular libraries used for flux?

543

Do you think reactjs has any limitations? If so, tell a few?

462

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

433

What are the differences between controlled and uncontrolled components?

407

What are the lifecycle methods of reactjs components?

408

What are keys in reactjs and why are they important?

458

What are the component life cycle methods in reactjs?

497

What is the life cycle of reactjs components?

416

What are the methods called when state or props of the component is changed?

429

What is controllable component in reactjs?

444

What is component in reactjs?

529

What do you mean by reactjs?

432

What are the difference between pros and state?

500

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Un-Answered Questions { React.js }

What are higher order components(hoc)?

467

Please explain step by step approach on how to setup environment for reactjs?

404

What do you mean by reactjs?

432

Explain dom diffing?

415

What is the main goal of react fiber?

393

In which lifecycle event do you make ajax requests and why?

422

Explain the purpose of render() in react.

413

What is the difference between state and props?

442

What is refs?

533

What is Context?

405

What is “forward refs”?

423

How can you spill the reducers?

907

How can we build react in production mode?

390

What are the advantages of using reactjs?

503

What is inline conditional expressions?

504

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