C# - Functions and Subroutines Questions and Answers
C# Functions and Subroutines questions with answers provide a strong foundation in modular programming. These programming questions and answers with explanations help learners differentiate between functions, subroutines, and methods, focusing on parameter passing, return types, and scope rules. Practicing C# programming MCQ or programming interview questions with answers improves coding confidence and interview readiness. Companies like IBM, Infosys, and TCS often include C# function-based problems in their placement tests. Regular practice ensures a clear understanding of reusable code structures, a key skill in professional C# development.
C# - Functions and Subroutines
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29 questions
21. Which type of method can be called without creating an instance of the class?
- Instance methods
- Static methods
- Virtual methods
- Abstract methods
22. What is the difference between a function and a subroutine in C#?
- Functions return values, subroutines do not
- Subroutines return values, functions do not
- There is no difference in C#
- Functions are faster than subroutines
23. Which of the following is true about void methods?
- They must return a value
- They can return multiple values
- They do not return any value
- They can only be used in static classes
24. What is the purpose of method parameters with default values?
- To make parameters constant
- To allow calling methods without providing all arguments
- To increase method performance
- To hide parameters from other methods
25. Which keyword is used to pass parameters by reference in C#?
- out
- ref
- param
- byref
26. What happens if a non-void method doesn't have a return statement?
- It returns null automatically
- It causes runtime error
- It causes compilation error
- It returns default value
27. Which of the following describes a static method?
- Called using object instances
- Can access instance variables directly
- Called using class name without creating instances
- Cannot be called from other methods
28. What is the scope of variables declared inside a method?
- Global scope
- Class scope
- Method scope only
- Project scope
29. Which of the following is an advantage of using methods?
- Makes code longer
- Increases code duplication
- Promotes code reusability
- Makes debugging harder