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Interview Questions Answer

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Interview Questions
Interview Questions And Answer

1. Explain the concept of Virtual DOM in React?

Answer:

The Virtual DOM is a key concept in React. It's a lightweight copy of the actual DOM, and React uses it to improve performance by minimizing direct manipulations to the real DOM. Instead, React makes changes to the Virtual DOM, performs a "diffing" process to identify changes, and then updates only the necessary parts of the actual DOM. Candidates should understand the efficiency gains and benefits of using the Virtual DOM.

2. What is React and how does it differ from other JavaScript frameworks/libraries?

Answer:

This question assesses the candidate's understanding of React's fundamental concepts. The candidate should mention that React is a JavaScript library for building user interfaces, developed and maintained by Facebook. Emphasize the component-based architecture, virtual DOM, and the unidirectional data flow.

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