How do you cache a rendered MVC fragment?
PICTURE THIS: RAG CHATBOT
Simple meaning
Cache tag helpers or IMemoryCache around view component output.
WHY — Caching instead of guessing?
Why interviewers care about Caching:
question about Caching.
trade-offs, and what you would actually do on a .NET MVC project - not buzzwords.
Name the idea, why it exists, then one short example.
End with when you use it and one common pitfall.
STEPS — What happens step by step?
Before you speak the answer, walk the interviewer through these steps:
- 1Cache tag helpers or
IMemoryCache around view component output.
- 2Vary by user when
content is personal.
- 3Invalidation on writes prevents
stale prices.
- 4Give an example
One tiny concrete case you can say aloud.
- 5Common mistake
What juniors usually get wrong.
- 6Close
When you pick this over the alternative.
EXAMPLE — See it in action
Here's a short line you can speak, broken into clear beats:
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
Cache tag helpers or IMemoryCache around view component output. Vary by user when content is personal.