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💡 Brain Teaser
Which MongoDB command is used to retrieve documents?
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💡 Brain Teaser
What is req.params in Express used for?
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💡 Brain Teaser
What is the result of this query in MongoDB?
db.users.find({ name: { $in: [] } });
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💡 Brain Teaser
What does useEffect(() => {}, []) mean in React?
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💡 Brain Teaser
Which one ensures data consistency in MongoDB during multi-document operations?
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💡 Brain Teaser
In Node.js, what does this return?
console.log(typeof null);
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💡 Brain Teaser
Which of these is true about Express middleware?
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💡 Brain Teaser
What is the output of this MongoDB query?
db.users.find({ age: { $gte: 25, $lte: 25 } });
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💡 Brain Teaser #1
What will this print in React?
const [count, setCount] = useState(0);
setCount(count + 1);
setCount(count + 1);
console.log(count);
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💡 Brain Teaser! 🤔
What will the following code print?
Integer a = 128, b = 128;
System.out.println(a == b);
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