1.What is useEffect in React?

Simple Meaning

useEffect = Run some code after your component renders

That’s it at the core.

Think Like This

Imagine your React component is like a TV screen.

First, React shows the UI (render)

After that, you want to do some extra work:

Fetch data

Update something

Start a timer

Listen to events

That “extra work” is called a side effect

And useEffect is how you handle it

Basic Syntax

useEffect (() => { // your side effect code });

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Example

import { useEffect } from " react " ;

function App () { useEffect (() => { console .…