Cht India React Js Frontend Developer Interview Questions and Answers

A react js project , which contains login page registr page and some other pages . also contains a slider and navbar.

Q1. What is vertual dom .
Ans. 
Virtual DOM is a lightweight copy of the actual DOM that React uses to improve performance by minimizing direct manipulation of the real DOM.
• Virtual DOM is a concept used by React to optimize rendering performance.

• It is a lightweight copy of the actual DOM tree.

• React compares the virtual DOM with the real DOM and only updates the parts that have changed.

• This helps in reducing the number of direct manipulations to the r...read more
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Q2. What is hooks in react js
Ans. 
Hooks in React JS are functions that let you use state and other React features without writing a class.
• Introduced in React 16.8

• Allow you to use state and other React features in functional components

• Can be used for managing state, side effects, context, refs, and more

• Examples include useState, useEffect, useContext, etc.
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