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 pass data from child to parent component?

422

How do you this in constructor?

384

When rendering a list what is a key and what is it's purpose?

362

What's the difference between super() and super(props) in React when using ES6 classes?

499

What is Children?

356

How is react different?

410

Why reactjs is used?

372

What are the features of react?

387

How reactjs framework is different as compared to others?

379

How is react different from angular?

419

What is the lifecycle methods order in mounting?

372

What are higher order components(hoc)?

434

What are the advantages of redux?

412

How to update a component every second?

443

What do you understand with the term polling?

405

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Un-Answered Questions { React.js }

What is the difference between super() and super(props)?

453

What is render() in React? And explain its purpose?

457

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

399

How can you spill the reducers?

860

What are synthetic events in react?

407

Can a developer create animations in React?

414

What are fragments?

462

What is function based component?

398

What is JSX?

356

What are the methods called when state or props of the component is changed?

390

Explain error boundaries?

383

Explain the components of Redux?

422

How is flux different from redux?

396

What is meant by pooling?

411

How to use events in reactjs?

376

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