Technical interview questions and drills

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Showing the .NET Memory Management curriculum. Technology tags describe each drill's actual implementation context; shared drills can belong to more than one track.

Concept questionMedium~7 min

How can EF Core tracking affect memory usage?

Connects EF Core change tracking to object retention, query shape, projections, and read-only API performance.

In .NET Memory ManagementShared across 3 tracks

.NETASP.NET CoreC#

Drills

How can EF Core tracking affect memory usage?

How can event subscriptions cause memory leaks in .NET?

How does .NET garbage collection work, and why do generations matter?

How do memory dumps help diagnose .NET memory leaks?

How would you debug high GC CPU in production?

How would you debug memory growth after file uploads?

How would you design a memory-safe background batch job?

How would you diagnose Large Object Heap pressure in an API?

How would you investigate memory growth in a production .NET service?

How would you reduce allocations in a hot .NET API path?

What is the difference between a managed memory leak and allocation pressure?

What keeps an object alive in .NET?

What security concerns come with memory dumps?

What would you do after a .NET service crashes with OutOfMemoryException?

When does StringBuilder help, and when is it unnecessary?

When do you use IDisposable instead of a finalizer in .NET?

When is IAsyncDisposable useful in .NET?

When would you stream data instead of loading it all into memory?

When would you use Span, Memory, or ArrayPool in .NET?

Which memory metrics would you monitor for a .NET service?

Why can large allocations hurt a .NET application?

Why is an unbounded in-memory cache risky?

Why is it risky for a singleton to capture scoped services or request data?