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 react component lifecycle methods help in building interfaces?

455

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

405

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

435

Explain step by step approach on how to setup environment for reactjs?

350

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?

369

What is the difference between react components extend, createclass and mixins, hocs?

360

Which feature can we use to cause a component to render only when its id changes?

539

What is redux and flux?

380

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

369

Explain lifecycle of a react component?

396

What is reactjs-jsx? Explain basic code snippet of jsx with the help of a practical example?

390

How to set up routing in reactjs. Explain with the help of step by step approach?

334

What is a router in react.js?

381

Please explain step by step approach on how to setup environment for reactjs?

364

What are state and props in reactjs? What is the difference between the two?

425

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Un-Answered Questions { React.js }

Is it possible to use async/await in plain react?

368

What is the component lifecycle in reactjs?

434

How can I make an AJAX call?

437

How events are different in react?

427

How it is different from other front end language?

344

What is JSX?

352

What is reactjs-jsx?

369

How to use events in reactjs?

370

List down the components of redux?

433

How is react router different from conventional routing?

567

How to use loop in reactjs?

445

What is higher order components (hoc)?

373

Can you update the values of props?

378

What is the purpose of render() in react?

409

How do you pass data from child to parent component?

419

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