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Question: How does React handle forms?
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Answer: React handles forms using controlled components, where form elements (such as inputs,
textareas, and selects) are controlled by React state.
This means that the value of the form elements is stored in React state and updated using the onChange event handler.
By controlling form elements with React state, developers can easily access and manipulate form data,
validate inputs, and handle form submission.
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Question: What is the purpose of the 'children' prop in React?
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Answer: The 'children' prop is a special prop in React that allows components to pass children elements
to other components. It is used to render content between the opening and closing tags of a component.
The children prop can contain any valid React elements, including other components, text, or HTML elements.
Components can access and manipulate the children prop using the props.children property.
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Question: What are the differences between useState and useReducer hooks in React?
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Answer: Please find the difference below:
• useState: The useState is a built-in hook in React used for adding state to functional components.
It returns a stateful value and a function to update that value. useState is typically used for managing simple
state values or independent state variables.
• useReducer: The useReducer is a built-in hook in React used for managing more complex state logic
in functional components. It accepts a reducer function and an initial state and returns the current state
and a dispatch function. The useReducer is useful for managing state transitions that
involve multiple sub-values or complex state objects.
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Question: Can you explain usage of React Router in React applications?
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Answer: In React applications the React Router is a popular library to allow developers to define routes and
map them to specific components, enabling navigation between different views in a single-page application.
React Router provides components like BrowserRouter, Route, Link, and Switch to manage
routing and navigation.
Developers can use React Router to create dynamic and interactive user interfaces with client-side routing.
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Question: What is the purpose of the 'forwardRef' function in React?
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Answer: The 'forwardRef' function in React is used to forward refs from a child component to a DOM element
or another component. It is often used when you need to access the underlying DOM node of a child component or pass
a ref to a nested component.
The forwardRef allows components to interact with DOM elements or other components imperatively using refs while
preserving the component hierarchy and encapsulation.
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Question: What is the purpose of the 'useEffect' hook in React?
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Answer: The 'useEffect' hook in React is used to perform side effects in functional components.
It replaces lifecycle methods like componentDidMount, componentDidUpdate, and componentWillUnmount.
useEffect runs after every render and allows developers to perform tasks such as data fetching, subscriptions,
or DOM manipulation. It also supports cleanup by returning a function from the effect.
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Question: Can you explain the concept of 'code splitting' in React?
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Answer: The 'code splitting' is a technique used to split a large JavaScript bundle into smaller chunks that
can be loaded on demand. In React, code splitting is typically achieved using dynamic imports or tools like
webpack's import() function.
By splitting code into smaller chunks, one can reduce initial loading time of application and improve performance for large or complex applications.
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