Choose the correct answer
Anonymous Quiz
19%
[1,2], [1,2,3], [1,5]
25%
[1,2,3], [2,3,4], [1,5]
48%
[2,3], [2,3,4], [1,5]
9%
[2,3], [2,3,4], [1,4]
👍12❤1
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Guess the output.
let valueA = [5]; let valueB = [6]; console.log(valueA+valueB);
let valueA = [5]; let valueB = [6]; console.log(valueA+valueB);
Anonymous Quiz
32%
11
26%
Error
9%
Null
33%
56
👍12
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❤6👍1
👍11
let fruits = ['Apple', 'Banana'];
console.log(fruits[2]);
console.log(fruits[2]);
Anonymous Quiz
8%
Banana
3%
Apple
74%
Undefined
16%
throws an Error
console.log(“2”+1+1)
console.log(2+1+”1”)
console.log(2+1+”1”)
Anonymous Quiz
5%
31, 31
8%
4, 4
45%
211, 31
7%
NaN, NaN
35%
22, 31
👍3❤1
Which method is used to convert a JSON string into a JavaScript object?
Anonymous Quiz
37%
JSON.stringify()
42%
JSON.parse()
6%
JSON.convert()
15%
JSON.toObject()
👍9
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What would be the output?
console.log("A");
setTimeout(() => console.log("B"), 0);
Promise.resolve().then(() => console.log("C"));
console.log("D");👍2
What would be the output?
console.log(0.1 + 0.2 === 0.3);
console.log(0.1 + 0.2 === 0.3);
Anonymous Quiz
40%
True
54%
False
4%
NaN
2%
Undefined
Which hook is used for side effects in React functional components?
Anonymous Quiz
4%
useState
7%
useContext
87%
useEffect
3%
useReducer
In React, why is useMemo used?
Anonymous Quiz
5%
To store component state.
92%
To optimize expensive computations by memoizing results.
0%
To fetch data from APIs.
3%
To replace Redux.
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⏰ Time: 9:00 AM sharp
🎯 Format: 10 MCQs | ⏱ 10 seconds each
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❤4