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 are portals in react?

478

How are actions defined in redux?

444

List down the components of redux?

436

What are the popular packages for animation?

454

Why you can’t update props in react?

405

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

610

What is the purpose of push() and replace() methods of history?

428

What is the use of react-dom package?

415

What are the different phases of react component’s lifecycle?

567

What are fragments?

462

How do you apply vendor prefixes to inline styles in react?

511

Explain the lifecycle methods of react components in detail?

424

What is the recommended way for naming components?

385

What are the popular react-specific linters?

375

How to enable production mode in react?

476

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Un-Answered Questions { React.js }

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

398

Ho can you re-render a component without using setState() function?

429

What is the lifecycle methods order in mounting?

372

Explain the significance of store in redux?

404

What is the purpose of push() and replace() methods of history?

428

Differentiate between real dom and virtual dom?

339

Explain the difference between functional and class components.

371

Explain the meaning of Mounting and Demounting

363

What are pure components?

349

When was React first released?

411

How to update the state of the component in reactjs?

396

What do you understand by refs in react?

362

What do you understand by virtual dom?

377

How react router is different from history library?

509

Explain the use of ‘key’ in react list

418

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