Namespaces Questions and Answers
Namespaces in C# are essential for organizing code and preventing naming conflicts in large projects. This article presents Namespaces in C# programming questions with answers that help you understand how namespaces work and how they’re applied in real-world development. Frequently asked in TCS, Wipro, and Capgemini interviews, these programming interview questions with answers cover syntax, nested namespaces, and access modifiers. By practicing these questions, you’ll improve your understanding of structured coding and boost your preparation for technical interviews and C# certification tests.
Namespaces
Showing 10 of
30 questions
21. What does the "using" directive do?
- It includes a file in the project
- It imports types from other namespaces
- It defines a new namespace
- It creates an alias for a type
22. Which statement about namespace accessibility is correct?
- Namespaces can be private or internal
- Namespaces are always publicly accessible
- Namespaces can have access modifiers
- Namespaces inherit accessibility from parent
23. How do you reference a class from the global namespace?
- root::ClassName
- global::ClassName
- base::ClassName
- system::ClassName
24. What is the relationship between namespaces and assemblies?
- One assembly equals one namespace
- Namespaces and assemblies are the same
- A namespace can span multiple assemblies
- Assemblies cannot contain multiple namespaces
25. Which of these correctly demonstrates namespace usage?
- using System; class Program { static void Main() { Console.WriteLine("Hello"); } }
- namespace MyApp { using System; class Program { } }
- import System; class Program { }
- Both A and B
26. What is the effect of the "using" directive within a namespace declaration?
- It makes the directive global
- It limits the directive scope to that namespace
- It causes a compilation error
- It has no effect
27. How can you prevent namespace pollution?
- By using wildcard imports
- By using specific using directives
- By putting all code in one namespace
- By using global imports only
28. What is namespace collision?
- When namespaces use too much memory
- When the same type exists in multiple imported namespaces
- When namespaces are too deeply nested
- When using directives are missing
29. Which directive helps resolve namespace conflicts?
- namespace directive
- alias directive
- using directive with aliases
- conflict directive
30. What is the default namespace for a new C# console application?
- System
- Console
- The project name
- Global