In React, what is state?

In React, what is state?

• A. Data in our application that can change
• B. A property passed from parent to child
• C. A function that returns UI
• D. A static configuration

Answer: (A)

State is the data that lives in a component and can change over time. It represents values that determine what gets rendered and how the UI looks. When state changes, the component re-renders to reflect the new values. In functional components you create state with a setter function (from useState) and call it when something changes, like a user typing or a button click. This dynamic data is what makes a React UI interactive. Props are values passed from a parent to a child and are read-only for the child; they influence what the child renders but aren’t where local mutations live. A function that returns UI describes how you render, not the data itself. A static configuration is just constant data that doesn’t change. So state best captures the idea of data in our app that can change and drives the UI.

State is the data that lives in a component and can change over time. It represents values that determine what gets rendered and how the UI looks. When state changes, the component re-renders to reflect the new values. In functional components you create state with a setter function (from useState) and call it when something changes, like a user typing or a button click. This dynamic data is what makes a React UI interactive. Props are values passed from a parent to a child and are read-only for the child; they influence what the child renders but aren’t where local mutations live. A function that returns UI describes how you render, not the data itself. A static configuration is just constant data that doesn’t change. So state best captures the idea of data in our app that can change and drives the UI.