
ReactJS Quiz
Quiz
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Other
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Professional Development
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Practice Problem
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Medium
Vengatesh vengatesh
Used 28+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is used in React.js to increase performance?
Virtual DOM
Original DOM
Both A and B
None of the above
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In which language is React.js written?
Python
Javascript
Java
Vite
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many elements can a valid react component return?
1
2
3
4
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following function is used to change the state of react component?
setState()
state()
setChangeState()
None of the above
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Total ways of defining variables in ES6 is?
1
2
3
4
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
JSX stands for
Javascript XML
JSON XML
JSON
Javascript and AngularJS
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Choose the functionality of setState?
Access the previous state before the setState operation.
invoke code after the setState operation is done
replace this date completely instead of the default merge action
none of the above
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