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Aporeon

Technical interview practice, from one developer to another.

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Concept questionEasy~5 min

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

Introduces managed heap cleanup, generational collection, object lifetime, and why allocation behavior affects .NET services.

Debugging scenarioHard~12 min

How would you debug high GC CPU in production?

Covers allocation rate, collection frequency, latency symptoms, and safe production steps for GC-heavy services.

.NETASP.NET CoreC#

Practice drill

Comparison questionEasy~5 min

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

Clarifies the difference between objects being retained accidentally and code simply allocating too much temporary memory.

Concept questionMedium~7 min

What keeps an object alive in .NET?

Explains how GC roots retain reachable object graphs and turns heap evidence into a concrete ownership fix for static state, events, closures, queues, and caches.

Comparison questionMedium~7 min

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

Distinguishes deterministic cleanup from finalization and explains resource ownership in normal application code.

Concept questionMedium~7 min

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

Identifies useful memory and GC signals for alerting without overwhelming the team with noisy telemetry.

.NETASP.NET CoreC#

Concept questionMedium~7 min

Why can large allocations hurt a .NET application?

Covers the Large Object Heap, big buffers, fragmentation pressure, and practical ways to avoid loading too much at once.