Test your knowledge

• 1. What is React?

  A. React is an open-source frontend JavaScript library which is used for building user interfaces especially for single page applications. It is used for handling view layer for web and mobile apps.B. React is an open-source model–view–viewmodel front end JavaScript framework for building user interfaces and single-page applications.C. React is a programming language that conforms to the ECMAScript specification.

• 2. What are the major features of React?

  A. It uses VirtualDOM instead of RealDOM considering that RealDOM manipulations are expensive.B. Supports server-side rendering, uses reusable/composable UI components to develop the view.C. A and B

• 3. Everything in React is a ...?

  A. ModuleB. ComponentC. Class

• 4. Keys are given to a list of elements in react. These keys should be -

  A. Do not requires to be uniqueB. Unique in the DOMC. Unique among the siblings only

• 5. Who Develop React.js?

  A. FacebookB. AppleC. Twitter

• 6. Which of the following API is a MUST for every ReactJS component?

  A. componentDidMount()B. renderComponentC. getInitialState