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

React.js Interview Questions

Questions Answers Views Company eMail

Explain dom diffing?

415

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

481

Give me two most significant drawbacks of React?

409

State the difference between React JS and React Native

580

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

546

What is the Current Stable Version of React?

471

What is ‘create-react-app’?

419

Does React use HTML?

491

What is the use of ‘prop-types’ library?

510

What can be done when there is more than one line of expression?

539

What is Context?

405

What is the use of empty tags <> ?

430

What is the second argument that can optionally be passed to setState and what is its purpose?

566

Define the term Redux in React

438

How is react router different from conventional routing?

617

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Un-Answered Questions { React.js }

What are refs used for in React?

414

What are synthetic events in react?

452

What is react.js? How is it different from other javascript frameworks?

473

Name two types of React component?

472

State the difference between React JS and React Native

580

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

435

Explain the use of ‘key’ in react list

460

What is a state in react?

443

What is the difference between element and component?

616

Differentiate between stateful and stateless components?

412

What is the virtual dom, and a pragmatic overview of how react renders it to the dom in react.js?

412

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

483

What are Props in react js?

456

What is arrow function in react? How is it used?

455

What is React.cloneElement? And the difference with this.props.children?

421

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