React Questions

To help React efficiently update and re-render lists.

To associate event handlers with specific elements.

To give each element a unique identifier for styling purposes.

To define the order in which elements should be displayed.

Virtual DOM diffing

State reconciliation

Component rehydration

Lifecycle management

It relies on the browser to manage form data.

It maintains its own internal state for form data.

It uses external libraries for form handling.

It directly manipulates the DOM to update form values.

To directly manipulate the DOM

To manage application state

To break down the UI into independent, reusable pieces

To handle user interactions

An error is thrown

The prop will be undefined

The default prop value is used

The component will not render

Functional components are stateless, while class components can have state

Functional components cannot receive props, while class components can

Functional components are used for complex UI logic, while class components are for simple elements

Functional components are written in JavaScript, while class components use TypeScript

Inside the component's function body

Default props are not supported for functional components

By passing them as arguments to the component

Using the defaultProps property of the component function

To directly manipulate the DOM without using React's virtual DOM

To prevent default browser actions for all events

To provide a cross-browser consistent interface for handling DOM events

To enable asynchronous event handling in React components

An error will be thrown, and the application will crash.

The component will re-render, and the state change will be reflected correctly.

Nothing will happen; the state will remain unchanged.

The component will re-render, but the state change won't be reflected.

By using componentDidMount instead

By passing an empty array [] as the second argument to useEffect

By not passing a dependency array

By wrapping the useEffect call in a conditional statement