REACT NATIVE QUIZ DESCRIPTION Total Questions −30 00 Max Time − 15:00 To update state in react forcefully, which method is used setState forceUpdate Both of above None of above React is a ____. Web development Framework JavaScript Library jQuery Web Server Number of elements, a valid react component can return 1 2 3 5 How can you access the state of a component from inside of a member function? this.getState() this.state this.prototype.stateValue this.values What are Props? Props are arguments passed into React components Props are functions in the ReactJS Props are used to returns multiple values from the function All of the above Which of the following keyword is used to create a class inheritance? Create Inherits Extends This How many ways of defining your variables in ES6? 1 3 4 5 Keys are given to a list of elements in react. These keys should be Unique in the DOM Unique among the siblings only Do not requires to be unique None of above Which ReactJS command is used to create a new application? create-react-app new-react-app create-new-reactapp react-app ECMAScript was created to standardize _____. TypeScript Java JSON JavaScript In which of the following condition, the React.js Lifecycle method static getDerivedSateFromProps(props, state) is called? The component is created for the first time. The state of the component is updated. Both of the above. None of the above. A class is a type of function, but instead of using the keyword function to initiate it, which keyword do we use? Constructor Class Object DataObject Select apps which used react native . All Instagram pinterest Airbnb What does ReactJS cover? Data layer in an application User Interface layer in an application Both A & B All are Correct Which of the following function is called to render HTML to the web page in React? render() render() ReactDOM_render() render() React is also known as _____. ReactJS js Both A. and B. None of these Does React.js create a VIRTUAL DOM in the memory? TRUE FALSE Can be true or false Cannot say What is the correct syntax to write expression in JSX? [ expression ] { expression } {{ expression }} _expression What would be the output of the following example? var Helloword=(props)=> { return( <div> Hello World 1 </div> &n Hello World 1 Hello World 2 Hello World 1 Hello World 2 Error Which of the following are the advantages of React.js? React.js can increase the application's performance with Virtual DOM. React.js is easy to integrate with other frameworks such as Angular, BackboneJS since it is only a view library. React.js can render both on client and server side. All of the above React is a ________ Javascript library Javascript framework Both of above None of above How to install create-react-app? npx create-react-app -new my-app npx create-react-app -app my-app npx new-react-app my-app npx create-react-app my-app ______is used to create immutable stylesheet references none stylesheet Interaction manager Redux What is true for the keys given to a list of elements in React? Unique in the DOM. Unique among the siblings only. Do not require to be unique. None of the above. In ES6 – Which keyword is used for class inheritance? extends extend inheritance inheritances What changes would appear in the component as soon as the state of the React component is changed? It will do nothing; you have to call render method to render the component again. It will re-render the component. It can be create None of the above Which of the following is a must API for every React.js component? SetinitialComponent renderComponent render All of the above What of the following is used in React.js to increase performance? Original DOM Virtual DOM Both A and B. None of the above. Everything in react is __________ module component package class In ES6 – The class properties are assigned inside a _____ method. props() properties() constructor() react-properties() Previous Next Total Question16 Wrong Answer13 Right Answer13
