Tests understanding of Node.js's strengths and suitable use cases.
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use casesscalabilityreal-timearchitecture
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Read the code
I/O-bound endpoint: many slow calls, one thread, no blocking
// Aggregating 3 upstream APIs concurrently — Node excels here.
app.get('/dashboard', async (req, res) => {
const [user, orders, feed] = await Promise.all([
fetch('https://api/users/1').then(r => r.json()),
fetch('https://api/orders?user=1').then(r => r.json()),
fetch('https://api/feed').then(r => r.json()),
]);
res.json({ user, orders, feed });
});
// While these I/O calls are in flight, the thread serves other requests.05
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