Proves parallel speedup against a sequential baseline while accounting for overhead, saturation, tail latency, resource contention, and downstream impact.

.NETASP.NET CoreC#

Practice drill

Comparison questionMedium~7 min

PLINQ vs Parallel.ForEach for CPU-bound work

Chooses a parallel API based on whether the workload is a data query or an imperative loop and keeps CPU work pure, bounded, and measurable.

.NETC#

Practice drill

Debugging scenarioHard~10 min

Prove ThreadPool starvation with counters, stacks, and traces

Combines ThreadPool counters, repeated stack snapshots, and wait-event traces to distinguish blocked workers from CPU or dependency pressure.

.NETASP.NET Core

Practice drill

Debugging scenarioHard~12 min

Sync-over-async deadlock risk

Investigate deadlocks or starvation caused by blocking on async code with Result, Wait, or GetAwaiter().GetResult().

.NETASP.NET CoreC#

Practice drill

Comparison questionMedium~7 min

Task.Run vs async/await

Explain when Task.Run is useful, when async/await is enough, and why Task.Run is usually wrong for I/O in ASP.NET Core.

.NETASP.NET CoreC#

Practice drill

Comparison questionMedium~7 min

Task vs Thread in .NET

Compare Task and Thread in .NET, including abstraction level, scheduling, and when direct thread management is rarely appropriate.

.NETASP.NET CoreC#

Practice drill

Debugging scenarioHard~12 min

Thread pool starvation in .NET APIs

Diagnose thread-pool starvation caused by blocking work, unbounded concurrency, or sync-over-async in .NET APIs.

.NETASP.NET CoreC#

Practice drill

Concept questionHard~9 min

Why volatile does not make compound operations thread-safe

Separates memory visibility and ordering from atomic multi-step updates, avoiding volatile as a substitute for real synchronization.

.NETC#

Practice drill