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
36%
JSON.stringify()
42%
JSON.parse()
6%
JSON.convert()
16%
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
52%
False
5%
NaN
2%
Undefined
Which hook is used for side effects in React functional components?
Anonymous Quiz
6%
useState
9%
useContext
82%
useEffect
3%
useReducer
In React, why is useMemo used?
Anonymous Quiz
8%
To store component state.
87%
To optimize expensive computations by memoizing results.
3%
To fetch data from APIs.
3%
To replace Redux.
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🔥 Get ready for tomorrow’s Frontend Quiz Challenge!
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⏰ Time: 9:00 AM sharp
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Anonymous Poll
98%
Yes
2%
No
console.log(1 < 2 < 3);
console.log(3 > 2 > 1);
console.log(3 > 2 > 1);
Anonymous Quiz
56%
true true
28%
true false
5%
false true
11%
false false
let foo = () => arguments.length;
console.log(foo(1,2,3));
console.log(foo(1,2,3));
Anonymous Quiz
42%
3
12%
0
31%
Undefined
16%
Error
console.log(!!null, !!"", !!1);
Anonymous Quiz
50%
false false true
23%
true false true
13%
false true false
13%
true true true
let x = [1,2,3];
delete x[1];
console.log(x.length);
delete x[1];
console.log(x.length);
Anonymous Quiz
56%
2
20%
3
14%
Undefined
11%
Error
❤2