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 can you do with hoc?

173

What is the use of a super keyword in React?

167

State the main difference between Pros and State?

201

How Virtual-DOM is more efficient than Dirty checking?

202

Explain the use of the arrow function in React

181

What is meant by callback function? What is its purpose?

185

What are controlled and uncontrolled components in React?

159

Is setState() is async? Why is setState() in React Async instead of Sync?

167

Explain yield catchphrase in JavaScript

204

What is an Action? How do you describe an Action?

194

What kind of information controls a segment in React?

298

What is the difference between using constructor vs getInitialState in React?

191

How can you update state in react js?

189

Explain pure components in React js?

172

What is one of the core types in react?

172

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Un-Answered Questions { React.js }

What is meant by pooling?

150

Explain the limitations of react?

169

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

179

Explain the advantages of redux?

152

What do you understand by virtual dom?

173

What is the Current Stable Version of React?

158

What is the main goal of react fiber?

147

What is REFS in React

175

What kind of information controls a segment in React?

298

How to update a component every second?

208

Explain the significance of store in redux?

168

What is the significance of keys in react?

207

What are arrow functions? How are they used?

179

What is “forward refs”?

157

Why react js is faster?

164

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