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C# Quiz Topic Breakdown

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C# High-Level Assessment Topics

This page outlines the major topics covered in an advanced-level C# test, organized to help you review or create educational content. Each section represents a key area tested in the exam.

🧵 Threading & Concurrency

  • Interlocked.Increment
  • Monitor.Enter / Monitor.Exit
  • Thread-safe access to shared data
  • Task vs Thread
  • Task status and lifecycle (Status, IsCompleted, Faulted)
  • Thread construction, data passing
  • Thread start limitations

🧪 Pattern Matching

  • is pattern with switch
  • List patterns ([1, 2, ..], [.., >5], etc.)
  • Positional and property pattern matching
  • when guards

🧰 Reflection & Metadata

  • Accessing custom attributes like [Serializable]
  • AssemblyVersionAttribute
  • Reflection APIs (GetType(), GetCustomAttributes())
  • Using dynamic with Activator.CreateInstance
  • Loading assemblies via Assembly.LoadFile

🔠 Regular Expressions

  • Matching US phone numbers
  • Anchors (^, $)
  • Quantifiers ({3}, *, +, ?)
  • Special characters (literal vs control)
  • Splitting camel case strings

🔧 File I/O & Streams

  • MemoryStream and its behavior
  • File.WriteAllText, FileStream
  • Seek() vs Position
  • Overwriting vs appending files
  • Directory operations and locking

⚡ Events & Delegates

  • Declaring and invoking EventHandler
  • Null-safe invocation using ?.Invoke()
  • Thread-safe event raising
  • Multicast delegate behavior
  • Event subscription duplication

🧮 Math & Generic Constraints

  • INumber<T> (C# 11+ / .NET 7+)
  • Generic math in .NET
  • where T : notnull, INumber<T>
  • Type safety in generic methods
  • Null handling in generics

🔐 Security Algorithms

  • AES, RSA: secure algorithms
  • DES, 3DES: deprecated algorithms
  • SHA: hashing, not encryption

🔤 String & Regex Methods

  • Replace, ToUpper, Normalize
  • Regex for pattern validation

🧱 Structs vs Records

  • Use cases
  • Value vs reference semantics
  • Equality behavior
  • Inheritance restrictions
  • Record struct mutation (with, init-only props)
  • Overriding ToString in structs

⚙️ Module Initializers

  • ModuleInitializer attribute (C# 9+)
  • Constraints (must be static, parameterless, non-generic)

🧩 Dynamic Typing

  • dynamic vs var
  • Runtime binding and DLR
  • Limitations and performance

🧾 Assembly & Imports

  • using vs global using
  • File-scoped types (file class in C# 11)
  • Accessibility of file-level types

🔐 Access Modifiers and Property Accessors

  • init keyword
  • private set, private get
  • Constructor behavior with accessors

🧭 Performance Monitoring and Debugging

  • PerformanceCounter
  • Conditional breakpoints
  • Debugger.Break()
  • Evaluating system metrics

🎭 Reference Types and Ternary Operators

  • ref keyword
  • Conditional expressions with ref
  • Referencing array elements conditionally

🌐 Implementing IEnumerable

  • yield return
  • Interface implementation
  • Iterator patterns

📌 Tip:

You can use this structure to create individual Markdown pages or flashcards for focused study or learning resources.

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