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Quiz - React - 4
Select the right answer for below questions:
What is the purpose of the constructor method in React class components?
To handle events in the component
To render the component
To initialize the state of the component
To pass data from a parent component to a child component
To initialize the state of the component
What is the difference between a stateless component and a stateful component in React?
Stateless components do not have state, while stateful components have state
Stateless components are always functional components, while stateful components are always class components
Stateless components are only used for simple display purposes, while stateful components are used for more complex logic and interactions
Stateless components cannot receive props, while stateful components can receive props
Stateless components do not have state, while stateful components have state
What is the purpose of the React.createElement function in React?
To render a component to the DOM
To create a new instance of a React component class
To pass data from a parent component to a child component
To create a virtual React element that represents a DOM element
To create a virtual React element that represents a DOM element
What is the use of the useContext hook in React?
To handle events in a functional component
To add state to a functional component
To access data from a context in a functional component
To optimize the performance of functional components by returning a memoized version of a callback function
To access data from a context in a functional component
What is the difference between componentDidMount and componentDidUpdate lifecycle methods in React class components?
componentDidMount is called only once when the component is first rendered, while componentDidUpdate is called every time the component updates
componentDidMount is called every time the component updates, while componentDidUpdate is called only once when the component is first rendered
componentDidMount is used to handle asynchronous operations, while componentDidUpdate is used to handle synchronous operations
componentDidMount is used to update the state of the component, while componentDidUpdate is used to render the component
componentDidMount is called only once when the component is first rendered, while componentDidUpdate is called every time the component updates
What is the purpose of the dangerouslySetInnerHTML prop in React?
To handle events in a component
To render HTML markup as the content of an element
To store the component's state
To pass data from a parent component to a child component
To render HTML markup as the content of an element
What is the difference between setState and replaceState in React class components?
setState updates the state of the component and triggers a re-render, while replaceState only triggers a re-render without updating the state
setState adds a new state property to the component, while replaceState updates an existing state property
setState is only used in functional components, while replaceState can be used in both functional and class components
setStateis used to update the state of the component, whilereplaceState` is used to completely replace the state of the component
setState is used to update the state of the component, while replaceState is used to completely replace the state of the component
What is the difference between props and state in React?
Props are passed down from a parent component to a child component, while state is managed within a component
Props are used to store data that does not change, while state is used to store data that can change
Props are only used in functional components, while state can be used in both functional and class components
Props are used to render the component, while state is used to handle events in the component
Props are passed down from a parent component to a child component, while state is managed within a component
What is the purpose of the key prop in React when rendering a list of components?
To handle events in the components in the list
To improve the performance of the list by enabling React to identify and update only the components that have changed
To store the state of the components in the list
To pass data from a parent component to a child component in the list
To improve the performance of the list by enabling React to identify and update only the components that have changed
What is the difference between server-side rendering and client-side rendering in React?
Server-side rendering sends the HTML for the whole page to the browser, while client-side rendering sends only the necessary HTML for updates to the browser
Server-side rendering is faster, while client-side rendering is slower
Server-side rendering is only used for simple React applications, while client-side rendering is used for more complex React applications
Server-side rendering is performed on the server, while client-side rendering is performed in the browser
Server-side rendering is performed on the server, while client-side rendering is performed in the browser
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