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React JS MCQ
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- 17th Mar, 2023
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React JS MCQ Questions
React JS is the latest and most popular JavaScript framework. This React Js MCQ Test contains 30+ React Js Multiple Choice Questions. So, you have to select the right answer to check your final preparation for your Exams & Interviews. Besides this, you can also download the PDF Completely Free.
React Js MCQ Online Test
1) React.js is a free and open-source front-end .................
2) React.js was Initially released in ................
3) React.js has Written in ................
4) ............. is used in React.js to increase performance?
6) Which of the following command is used to create a react app?
7) .............. port is the default where the webpack-dev-server will run.
8) A valid react component can return only ......... element.
9) A state in React.js is also known is ..............
10) In React js what is used to pass data to a component from outside?
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11) How can you access the state of a component from inside of a member function?
12) Props are __________ into other components.
13) What is a react.js in MVC?
14) Keys are given to a list of elements in react. These keys should be -
15) Which of the following is the correct data flow sequence of flux concept?
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16) React.js covers only the view layer of the app.
17) React was originally developed by ...............
18) .............. helps react for keeping their data unidirectional.
19) React merges the object you provide into the current state using setState().
20) Arbitrary inputs of components are called ...........
21) We can prevent default behavior in React using ............
22) React is mainly used for building ................
23) What is the smallest building block of ReactJS?
24) Which function is used to change the state of react component?
25) What is React js?
26) Which of the following is used to create a class inheritance?
27) What are the ways to handle data in react.js?
28) Which of the following method is used for the parent class in React.Js?
29) React components are saved in ....................... directory.
30) useLayoutEffect function is used to .................
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Siya
31st Mar, 2023