Which hook is used for side effects in React functional components?
Anonymous Quiz
7%
useState
8%
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!
🗓 Date: Tomorrow Morning
⏰ Time: 9:00 AM sharp
🎯 Format: 10 MCQs | ⏱ 10 seconds each
🏆 Winner Announcement: Right after the quiz!
🚀 See you all tomorrow at 9 AM — let’s see who grabs the title!
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🤝Share & Join the group now👇🏻@React_JS_India
👆🏻👆🏻👆🏻👆🏻👆🏻👆🏻
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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
55%
true true
29%
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
11%
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