Which statement about rendering in React is true?

Which statement about rendering in React is true?

• A. Rendering is only used for the initial mount.
• B. Rendering should be avoided after initial load.
• C. Rendering updates the UI when state or props change.
• D. Rendering is done only by the browser, not React.

Answer: (C)

Rendering in React is driven by data changes. When a component’s state or its props change, React re-runs its render logic to produce a new element tree. It then reconciles this with what was rendered before and updates the DOM so the UI reflects the latest data. This is why updating the UI when state or props change is the correct statement. Rendering isn’t limited to the initial mount—every update triggers a render so the UI stays in sync with the data. Also, rendering isn’t done only by the browser; React orchestrates the process by generating the element tree and letting the browser apply the resulting DOM updates.

Rendering in React is driven by data changes. When a component’s state or its props change, React re-runs its render logic to produce a new element tree. It then reconciles this with what was rendered before and updates the DOM so the UI reflects the latest data. This is why updating the UI when state or props change is the correct statement. Rendering isn’t limited to the initial mount—every update triggers a render so the UI stays in sync with the data. Also, rendering isn’t done only by the browser; React orchestrates the process by generating the element tree and letting the browser apply the resulting DOM updates.