What is SaveChanges vs SaveChangesAsync?
PICTURE THIS: ASYNC / PROMISE
Call fetchPromise pending
NetworkWait off stack
Then / awaitUse the JSON
Simple meaning
Both persist tracked changes
WHY — EF Core instead of guessing?
Why interviewers care about EF Core:
They want a clean
contrast on EF Core, not two memorised paragraphs.
Say what changes for
the developer, then one case where picking wrong hurts.
Stay structured
Name the idea, why it exists, then one short example.
Close cleanly
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:
- 1Define it
Both persist tracked changes
- 2async frees the thread
during I/O.
- 3In ASP.NET I default
to the async version.
- 4Sync SaveChanges can starve
the thread pool under load.
- 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:
Say this line
“In ASP.NET I default to the async version.”
Break into beats
InASPNETIdefaultto
Speaking order
2987408337471632900
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
Both persist tracked changes async frees the thread during I/O.