React Basics

1/25 Which is the right way of accessing a function fetch() from an h1 element in JSX?
- <h1>{fetch()}</h1>
- <h1>${fetch()}</h1>
- <h1>{fetch}</h1>
- <h1>${fetch}</h1>
2/25 What will happen if you call setState() inside render() method?
- Repetitive output appears on the screen
- Duplicate key error
- Stack overflow error
- Nothing happens
3/25 What advantages does ReactJS have?
- Increases the application’s performance with Virtual DOM
- JSX makes a code that is easy to read and write
- It renders both on client and server side
- Easy to integrate with other frameworks(Angular, BackboneJS) since it is only a view library
- All of the above
4/25 What is ReactJS?
- Server side Framework
- User-interface framework
- Library for building interaction interfaces
5/25 In React, which method is used to create a context?
- React.createContext()
- React.createState()
- React.createComponent()
- React.createRef()
6/25 What is the use of the 'useReducer' hook in React?
- To manage state in a component
- To reduce the size of a component
- For state management with a reducer function
- To enhance performance
7/25 What is the purpose of the 'key' prop in a React list?
- To identify each element uniquely
- For styling elements
- To enhance performance
- To trigger events
8/25 What does 'PureComponent' do in React?
- Manages pure functions
- Prevents re-rendering if props and state have not changed
- Cleans up the component
- Enhances component performance
9/25 In React, what does the 'useEffect' hook do?
- Manages component lifecycle
- Handles state changes
- Creates a new effect
- None of the above
10/25 What is a higher-order component in React?
- A component that renders other components
- A component with higher z-index
- A stateful component
- A component with higher-order functions
11/25 What is the correct syntax for a functional component in React?
- function MyComponent() { return <div />; }
- class MyComponent extends React.Component { render() { return <div />; }}
- const MyComponent = () => { return <div />; }
- var MyComponent = function() { return <div />; }
12/25 What is the purpose of React Router?
- To manage global state
- For conditional rendering
- To handle navigation and routing
- To connect to external APIs
13/25 Which is a correct way to create a state in a class component?
```
class MyComponent extends React.Component { ... }
```
- this.state = { value: '' };
- const state = { value: '' };
- useState({ value: '' });
- setState({ value: '' });
14/25 What is the purpose of 'PropTypes' in React?
- To specify the types of props a component can receive
- To document the component code
- To improve performance
- To provide default values to props
15/25 How do you pass a prop named 'data' to a component named 'MyComponent'?
- <MyComponent data={this.props.data} />
- <MyComponent props={data} />
- <MyComponent>{data}</MyComponent>
- <MyComponent data='data' />
16/25 What is the significance of the 'key' prop when rendering a list of items in React?
- It is used for styling the list items
- It helps React identify which items have changed
- It is a required prop for all list items
- It increases the rendering speed of the list
17/25 What is the use of 'useState' hook in React?
- To manage state in functional components
- To link state between components
- To update state in class components
- To store data in the browser's local storage
18/25 What is a 'prop' in React?
- A function inside a component
- A state variable in a component
- A read-only attribute used in a component
- A style attribute of HTML elements
19/25 How do you conditionally render components in React?
- Using if-else statements inside JSX
- Using the ternary operator inside JSX
- Using for loop inside JSX
- Using switch-case inside JSX
20/25 What is the purpose of the 'useEffect' hook?
- To handle state changes
- To create a new component
- To perform side effects in functional components
- To connect to a Redux store
21/25 What is the purpose of React's 'useCallback' hook?
- To memorize a function instance between renders
- To call a function as a callback after state changes
- To handle API calls efficiently
- To update the state based on previous state
22/25 What is 'prop drilling' in React?
- Passing props through multiple layers of components
- A method to define PropTypes in a component
- Drilling down to find errors in props
- A React library for handling properties
23/25 How do you optimize performance for a list of items in React that are frequently re-rendered?
- Using shouldComponentUpdate
- Using PureComponent
- Using React.memo
- Using useState
- Using useEffect
24/25 Which method is the right choice to fetch data in a useEffect hook?
- componentDidMount
- useFetch
- fetch API
- getData()
- useDataFetching
25/25 What are 'fragments' in React?
- Tools for memory management
- Components that return multiple elements
- A pattern for prop validation
- Parts of the component's state
To get the result of the quiz, please provide your email address (optional)..

It seems you haven't answered any questions yet. Please provide your answers to proceed.

React Basics

1/25 Which is the right way of accessing a function fetch() from an h1 element in JSX?

2/25 What will happen if you call setState() inside render() method?

3/25 What advantages does ReactJS have?

4/25 What is ReactJS?

5/25 In React, which method is used to create a context?

6/25 What is the use of the 'useReducer' hook in React?

7/25 What is the purpose of the 'key' prop in a React list?

8/25 What does 'PureComponent' do in React?

9/25 In React, what does the 'useEffect' hook do?

10/25 What is a higher-order component in React?

11/25 What is the correct syntax for a functional component in React?

12/25 What is the purpose of React Router?

13/25 Which is a correct way to create a state in a class component?

14/25 What is the purpose of 'PropTypes' in React?

15/25 How do you pass a prop named 'data' to a component named 'MyComponent'?

16/25 What is the significance of the 'key' prop when rendering a list of items in React?

17/25 What is the use of 'useState' hook in React?

18/25 What is a 'prop' in React?

19/25 How do you conditionally render components in React?

20/25 What is the purpose of the 'useEffect' hook?

21/25 What is the purpose of React's 'useCallback' hook?

22/25 What is 'prop drilling' in React?

23/25 How do you optimize performance for a list of items in React that are frequently re-rendered?

24/25 Which method is the right choice to fetch data in a useEffect hook?

25/25 What are 'fragments' in React?