Which statement about React components is true?

Which statement about React components is true?

• A. Functional components are plain JavaScript functions that return JSX and do not require class syntax.
• B. Class components extend React.Component and can hold state.
• C. Hooks can only be used in class components.
• D. Functional components cannot have lifecycle methods (even with hooks).

Answer: (A)

Functional components in React are plain JavaScript functions that return JSX, and they do not require class syntax. They simply take props as input and render UI by returning React elements. With hooks, these function components can also manage state and perform side effects, all without turning into a class. This makes them lightweight and often easier to reason about, while still fitting into React’s rendering model. The other statement describes class components, which is true for that pattern, but the defining, broadly applicable idea today is that you can write components as simple functions that return JSX without needing to use classes.

Functional components in React are plain JavaScript functions that return JSX, and they do not require class syntax. They simply take props as input and render UI by returning React elements. With hooks, these function components can also manage state and perform side effects, all without turning into a class. This makes them lightweight and often easier to reason about, while still fitting into React’s rendering model. The other statement describes class components, which is true for that pattern, but the defining, broadly applicable idea today is that you can write components as simple functions that return JSX without needing to use classes.