Which two mechanisms provide dynamic information to a React component?

Which two mechanisms provide dynamic information to a React component?

• A. Props and state
• B. Context and refs
• C. Events and lifecycles
• D. Render and commit

Answer: (A)

Dynamic information that determines what a React component renders comes from props and state. Props are values passed from a parent component; when the parent updates its props, the child re-renders with the new data. State is internal to the component and updated by the component itself; changing state triggers a re-render with the updated values. Together, they provide the data that drives the UI. Context can share data across many components, and refs access DOM nodes or component instances, but they aren’t the primary sources of dynamic render data. Events and lifecycles describe when things happen or how components mount and update, not the actual data values driving rendering. Render and commit are parts of React’s internal process, not data sources.

Dynamic information that determines what a React component renders comes from props and state. Props are values passed from a parent component; when the parent updates its props, the child re-renders with the new data. State is internal to the component and updated by the component itself; changing state triggers a re-render with the updated values. Together, they provide the data that drives the UI.

Context can share data across many components, and refs access DOM nodes or component instances, but they aren’t the primary sources of dynamic render data. Events and lifecycles describe when things happen or how components mount and update, not the actual data values driving rendering. Render and commit are parts of React’s internal process, not data sources.