Explain React state and props. - React Interview Questions | React Developer Jobs & Interview Prep

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Explain React state and props.

React Hooks

#react#component#hook#state#props#performance#functional-component#intermediate

Answer

In React, state and props are two core concepts used to manage and pass data in components:

State is a local, mutable data container within a component.
Props (short for properties) are read-only, external data passed to a component from its parent.

Feature	📦	🎁
Mutability	Mutable (can change over time)	Immutable (read-only)
Scope	Local to the component	Passed from parent to child
Who sets it?	Set and managed inside the component	Set by the parent component
Usage	To track UI changes (e.g., user input)	To configure or customize child components
Updates cause re-render?	✅ Yes	✅ Yes

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