High EF Core Question 100 of 215

How do you tune EF Core for bulk inserts?

.NET / C# · Speak this in 60–90 seconds · Faridabad & Delhi NCR

Without indexScan every row

With indexJump to keys

CostWrites slower

I batch with AddRange, raise MaxBatchSize, or use bulk extensions for millions of rows.

Why interviewers care about EF Core:

This is a process

question about EF Core.

Panels listen for order,

trade-offs, and what you would actually do on a .NET project - not buzzwords.

Stay structured

Name the idea, why it exists, then one short example.

Close cleanly

End with when you use it and one common pitfall.

Before you speak the answer, walk the interviewer through these steps:

1
I batch with AddRange,
raise MaxBatchSize, or use bulk extensions for millions of rows.
2
Change tracking overhead dominates
naive loops.
3
For ETL I sometimes
drop to SqlBulkCopy.
4
Give an example
One tiny concrete case you can say aloud.
5
Common mistake
What juniors usually get wrong.
6
Close
When you pick this over the alternative.

Here's a short line you can speak, broken into clear beats:

Say this line

“Change tracking overhead dominates naive loops.”

Break into beats

Changetrackingoverheaddominatesnaiveloops

Speaking order

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Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.

I batch with AddRange, raise MaxBatchSize, or use bulk extensions for millions of rows. Change tracking overhead dominates naive loops.