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?

392

What is props?

383

What are the popular libraries used for flux?

510

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

415

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

398

What are the differences between controlled and uncontrolled components?

366

What are the lifecycle methods of reactjs components?

371

What are keys in reactjs and why are they important?

428

What are the component life cycle methods in reactjs?

455

What is the life cycle of reactjs components?

374

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

390

What is controllable component in reactjs?

399

What is component in reactjs?

484

What do you mean by reactjs?

395

What are the difference between pros and state?

454

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Un-Answered Questions { React.js }

What are the major issues of using MVC architecture in React?

509

In what cases would you use a class component over a functional component?

343

What is SyntheticEvent?

378

How can we find the version of react at runtime in the browser?

610

what is the usage of refs and keys used in react?

445

How to dispatch the data in-store?

433

What is flux concept in reactjs?

401

What are the advantages and disadvantages of using react components?

463

What are refs in reactjs? When to use it.

394

What is the Current Stable Version of React?

426

How to update the state of the component in reactjs?

396

Explain error boundaries?

383

What is the recommended way for naming components?

384

What are the lifecycle steps of React?

445

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

408

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