Recall & Review
beginner
What is caching in the context of Node.js applications?
Caching means storing data temporarily so the app can get it faster next time without doing the full work again.
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beginner
How does caching improve performance?
It reduces the time to get data by avoiding repeated slow operations like database queries or API calls.
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beginner
Name one common place where caching is used in Node.js apps.
Caching is often used in memory (like with Redis or in-process variables) to store results of expensive operations.
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intermediate
What can happen if caching is not used wisely?
The app might be slow, use more resources, or give outdated data if cache is not managed properly.
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beginner
Why is caching especially important for web servers?
Because web servers handle many requests quickly, caching helps respond faster and handle more users smoothly.
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What is the main benefit of caching in Node.js?
✗ Incorrect
Caching stores data temporarily to speed up access, making responses faster.
Which of these is a common caching tool used with Node.js?
✗ Incorrect
Redis is a popular in-memory cache used to speed up data retrieval.
What risk comes from caching outdated data?
✗ Incorrect
If cache is not updated, users may see stale or incorrect data.
Caching helps web servers by:
✗ Incorrect
Caching speeds up repeated data access, helping servers respond faster.
Which is NOT a benefit of caching?
✗ Incorrect
Caching does not provide unlimited storage; it stores limited data temporarily.
Explain why caching matters in Node.js applications and how it affects performance.
Think about how storing data helps avoid slow operations.
You got /4 concepts.
Describe potential problems if caching is not managed properly in a web server.
Consider what happens if old data stays in cache too long.
You got /4 concepts.