MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Technical MCQs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In React, component properties should be kept in an object called? |
| A. | component |
| B. | super |
| C. | state |
| D. | props |
| E. | |
| Answer» D. props | |
| 2. |
Everything in react is a? |
| A. | Module |
| B. | Package |
| C. | Class |
| D. | Component |
| Answer» E. | |
| 3. |
Does React creates a VIRTUAL DOM in memory. |
| A. | TRUE |
| B. | FALSE |
| C. | Can be true or false |
| D. | Can not say |
| Answer» B. FALSE | |
| 4. |
JSX allows us to write HTML elements in JavaScript and place them in the DOM without any? |
| A. | createElement |
| B. | appendChild |
| C. | getElementById |
| D. | Both A and B |
| Answer» E. | |
| 5. |
In ES6, how many ways of defining your variables? |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 6 |
| Answer» B. 4 | |
| 6. |
To create a class inheritance, use the ________ keyword. |
| A. | create |
| B. | inherits |
| C. | extends |
| D. | this |
| Answer» D. this | |
| 7. |
A class is a type of function, but instead of using the keyword function to initiate it, we use the keyword? |
| A. | constructor |
| B. | class |
| C. | object |
| D. | dataObject |
| Answer» C. object | |
| 8. |
Initial Release to the Public (V0.3.0) was in ? |
| A. | 2011 |
| B. | 2012 |
| C. | 2013 |
| D. | 2014 |
| Answer» D. 2014 | |
| 9. |
Which command is used Install create-react-app? |
| A. | npm install -g create-react-app |
| B. | npm install create-react-app |
| C. | npm install -f create-react-app |
| D. | install -g create-react-app |
| Answer» B. npm install create-react-app | |
| 10. |
Which of the following is true about React? |
| A. | React is a JavaScript library for building user interfaces. |
| B. | React is used to build single page applications. |
| C. | React allows us to create reusable UI components. |
| D. | All of the above |
| Answer» E. | |