7 questions for “String Handling & StringBuilder”

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Information Technology

7 questions in 1 technology

#	Question	Technology	Topic	Level
1	How do you convert between an enum value and its underlying numeric value, and between an enum and its string name? C# › Enums & Flags	C#	Enums & Flags	Beginner
2	How do you slice an array or string efficiently without allocating a new array/string, using Span<T> or ReadOnlySpan<T>? C# › Arrays, Span<T> & Memory<T>	C#	Arrays, Span<T> & Memory<T>	Intermediate
3	How does the [Flags] attribute change the output of ToString() on a combined flags enum value? C# › Enums & Flags	C#	Enums & Flags	Intermediate
4	How does string interpolation work, and how does it compare to string.Format() and simple concatenation? C# › Fundamentals	C#	Fundamentals	Intermediate
5	How would you write a high-performance CSV field parser using ReadOnlySpan<char> that avoids all intermediate string allocations? C# › Arrays, Span<T> & Memory<T>	C#	Arrays, Span<T> & Memory<T>	Advanced
6	How do C# 11's raw string literals (`"""..."""`) simplify writing strings containing quotes, escape sequences, or multi-line content like JSON or SQL? 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
7	How do StreamReader and StreamWriter differ from directly using a FileStream, and when would you choose them? C# › File I/O & Streams	C#	File I/O & Streams	Intermediate