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 can you do with hoc?

351

What is the use of a super keyword in React?

329

State the main difference between Pros and State?

436

How Virtual-DOM is more efficient than Dirty checking?

401

Explain the use of the arrow function in React

372

What is meant by callback function? What is its purpose?

355

What are controlled and uncontrolled components in React?

321

Is setState() is async? Why is setState() in React Async instead of Sync?

370

Explain yield catchphrase in JavaScript

364

What is an Action? How do you describe an Action?

490

What kind of information controls a segment in React?

637

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

428

How can you update state in react js?

432

Explain pure components in React js?

344

What is one of the core types in react?

367

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Un-Answered Questions { React.js }

When would you use setstate() and forceupdate()?

293

Define the term Redux in React

372

What is the difference between shadow dom and virtual dom?

425

How to build the React app for production?

393

Which is best react or angular?

327

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

365

What is uncontrollable component in reactjs?

373

Explain basic code snippet of jsx with the help of a practical example?

327

How to set up routing in reactjs?

378

What is the ‘Store’ feature in Redux?

327

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

396

What is React?

343

What are the feature of reactjs?

518

How will be you able to handle more action using redux?

355

Explain the different phases of react component’s lifecycle?

336

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