IMPACT Infotech React Js Frontend Developer Interview Questions and Answers

Coding test
Ex program and math

Q1. Technical interview About Web dev technology
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Q2. Oops Web development concept Node. Js, react.js
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Q3. Oops question ex encapsulation etc
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Q4. What is props and state
Ans. 
Props are read-only data passed from parent to child components, while state is mutable data managed within a component.
• Props are used to pass data from parent to child components

• Props are read-only and cannot be modified by the child component

• State is mutable data managed within a component

• State can be updated using setState() method

• Example: props are used to pass a user's name to a child component, while state is use...read more
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Q5. What is virtual dom
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Virtual DOM is a lightweight copy of the actual DOM that React uses to improve performance by minimizing direct manipulation of the actual DOM.
• Virtual DOM is a concept in React where a lightweight copy of the actual DOM is created and updated instead of directly manipulating the actual DOM.

• When changes are made to the virtual DOM, React compares it with the actual DOM and only updates the necessary parts, reducing the ...read more
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