“Attributes & Reflection” in Information Technology

14 questions across 1 technology.

Information Technology

14 questions in 1 technology

#	Question	Technology	Topic	Level
1	How does the .NET dependency injection container and ASP.NET Core's model binding use reflection and attributes together under the hood? C# › Attributes & Reflection	C#	Attributes & Reflection	Advanced
2	What is reflection in C#, and what are its most common practical uses and performance trade-offs? C# › Attributes & Reflection	C#	Attributes & Reflection	Intermediate
3	What is reflection, and what basic information can you retrieve from a Type object at runtime? C# › Attributes & Reflection	C#	Attributes & Reflection	Beginner
4	How do you use reflection to read a custom attribute's values off a property at runtime? C# › Attributes & Reflection	C#	Attributes & Reflection	Intermediate
5	How do you dynamically create an instance of a type and invoke a method on it using reflection, when the type isn't known at compile time? C# › Attributes & Reflection	C#	Attributes & Reflection	Intermediate
6	How would you write a simple reflection-based object mapper that copies matching property values from one object to another of a different type? C# › Attributes & Reflection	C#	Attributes & Reflection	Advanced
7	How do you use reflection to discover all types in an assembly that implement a specific interface, useful for plugin discovery? C# › Attributes & Reflection	C#	Attributes & Reflection	Advanced
8	Why is reflection generally slower than direct code, and what techniques (like caching or compiled expressions) mitigate this cost? C# › Attributes & Reflection	C#	Attributes & Reflection	Advanced
9	How would you use System.Reflection.Emit or source generators as faster, more modern alternatives to runtime reflection for code generation scenarios? C# › Attributes & Reflection	C#	Attributes & Reflection	Advanced
10	What is an attribute in C#, and how do you apply one to a class or method? C# › Attributes & Reflection	C#	Attributes & Reflection	Beginner
11	How do you create a custom attribute class, and what does AttributeUsage control? C# › Attributes & Reflection	C#	Attributes & Reflection	Intermediate
12	How do generic attributes (introduced in C# 11) work, and what limitation did they finally remove compared to older attribute usage patterns? C# › Generics	C#	Generics	Advanced
13	How do you create a 'flags' enum that supports combining multiple values using bitwise operations? C# › Enums & Flags	C#	Enums & Flags	Intermediate
14	How does the 'file' access modifier (C# 11) create a type visible ONLY within its own source file, and what problem does this solve for source generators? C# › Modern C# Features (Global Usings, File-Scoped Namespaces, Top-Level Statements)	C#	Modern C# Features (Global Usings, File-Scoped Namespaces, Top-Level Statements)	Advanced