REACT 2

ReactJS covers _________

• User Interface layer in an application
• Data layer in an application
• Both a and b
• None of above

ReactJS uses _____ to increase performance

• Virtual DOM
• Original DOM
• Both of above
• None of above

React is _______

• Component based
• Module based
• Both of above
• None of above

Consider following example<br /><br />var Helloword=(props)=><br />{<br /> return(<br /> <div><br /> hello world 1<br /> </div><br /> <div><br /> Hello world 2<br /> </div><br /> );<br />}<br />ReactDOM.render(<Helloworld/>,mountNode)<br />What will be the output<br /><br />

• Hello world 1
• Hello world 2
• Hello world 1 Hello world 2
• Error

Number of elements, a valid react component can return

• 1
• 2
• 3
• 4

State in react is________

• A permanent storage
• Internal storage of the component
• Both of above
• None of above

props in react can________

• Be changed inside the component
• Not be changed in the component
• Be changed in side other component
• None of above

React.js was created by

• Jordan Walke
• Jordan mike
• Tim Lee
• Jordan Lee

What is ReactJs?

• Server side framework
• A Library for building interaction interfaces
• Client Side Framework
• None of the above

Name the function used to change the state of react component

• this.setState
• this.setChangeState
• this.State{}
• Both A and B