AWS, JavaScript, React - Deploy Web Apps on the Cloud - Using React State Hook

The video tutorial explains how to manage state in React using the useState hook. It covers initializing state with an initial value, reading and updating state, and handling user input to update state. The tutorial also highlights React's efficient re-rendering process, which updates only the necessary DOM elements. The lesson concludes with a preview of expanding state management in the next session.

What is the primary purpose of hooks in React?

• To manage state and lifecycle features in functional components

• To style components

• To create class-based components

• To handle HTTP requests

Which function is used to initialize state in a React component?

• useContext

• useReducer

• useState

• useEffect

What does the useState hook return?

• A promise that resolves to the state value

• An object with state and setState properties

• An array with the current state value and a function to update it

• A single value representing the state

How does React determine which DOM elements to update when state changes?

• It updates elements based on their CSS classes

• It relies on the developer to specify which elements to update

• It uses a virtual DOM to identify and update only the necessary elements

• It updates all elements in the DOM

What happens when the state in a React component is updated?

• Only the component with the updated state is re-rendered

• The entire application is reloaded

• The state is logged to the console

• The component is removed from the DOM