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

React.js Interview Questions

Questions Answers Views Company eMail

How do you create an event in react?

422

How to add google analytics for react router?

416

Explain flux?

449

Why is switch keyword used in react router v4?

368

What is the significance of store in redux?

398

What is the purpose of render method of react-dom?

399

Why is a component constructor called only once?

407

Explain the role of reducer?

411

What is react router?

399

What are synthetic events in react?

407

What is jest?

431

How is redux different from flux?

404

What are the main features of react intl?

387

What do you know about controlled and uncontrolled components?

352

List some of the cases when you should use refs?

333

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Un-Answered Questions { React.js }

Explain the use of ‘key’ in react list

418

How to enable production mode in react?

476

How can we do server-side rendering in React?

429

What is flux?

368

Why reactjs is used?

372

What are the differences between controlled and uncontrolled components?

366

What is the main difference between createElement and cloneElment?

413

What is higher order components (hoc)?

378

Explain the term reconciliation?

358

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

452

What are controlled components?

362

How can you spill the reducers?

860

What are the advantages of redux?

412

What are components in reactjs? Explain the component lifecycle with the help of a diagram explaining each component method in detail. Also, give an example of both stateless and stateful components with source code?

382

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

512

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