Which statement describes mounting events?

Which statement describes mounting events?

• A. Mounting Events Run Only Once During Initial Render
• B. Mounting Events Run On Every Render
• C. Mounting Events Run After Updates
• D. Mounting Events Run During Unmount

Answer: (A)

Mounting refers to the moment a component is created and inserted into the DOM for the first time. In class components, a method like componentDidMount runs after this initial render; in function components, useEffect with an empty dependency array runs on mount. Because mounting happens only once in the component’s life, these events occur just after the initial render and do not repeat on subsequent updates. The other lifecycle phases—updating (when props or state change) and unmounting (when the component is removed)—handle different timing, not the initial mount. So the statement that mounting events run only once during the initial render is the correct description.

Mounting refers to the moment a component is created and inserted into the DOM for the first time. In class components, a method like componentDidMount runs after this initial render; in function components, useEffect with an empty dependency array runs on mount. Because mounting happens only once in the component’s life, these events occur just after the initial render and do not repeat on subsequent updates. The other lifecycle phases—updating (when props or state change) and unmounting (when the component is removed)—handle different timing, not the initial mount. So the statement that mounting events run only once during the initial render is the correct description.