Frontend development - Quiz 4

Which of the following is used in React.js to increase performance?

• Virtual DOM

• Original DOM

• Both A and B

• None of the above

What is ReactJS?

• Server-side framework

• user interface framework

• both a and b

• none of the above

Identify the command used to create a react app

• npm install create-react-app

• npm install -g create-react-app

• install -g create-react-app

Which of the following port is the default where webpack-dev-server runs?

• 3000

• 3306

• 3030

• 8080

How many elements can a valid react component return?

• 1

• 2

• 3

• 4

State whether true or false: React.js covers only the view layer of the app.

• True

• False

Among The following options, choose the one which helps react for keeping their data uni-directional?

• DOM

• Flux

• JSX

• Props

Using which of the following command can prevent default behaviour at in react?

• preventDefault()

• avoidDefault()

• revokeDefault()

• None of the above

Identify the smallest building block of React.JS.

• Props

• Elements

• Components

• None of the above

Which of the following function is used to change the state of react component?

• this.setState()

• this.state()

• this.setChangeState()

• None of the above