Which among the following is the correct statement about the using statement used in C#.NET?
A. A C#.NET source code file consists of any number of using statement
B. By using 'using' statement it's possible to create an alias for the namespace but not for the namespace element
C. It is permitted to define a member at namespace level using alias
D. Using statement can be placed anywhere in the C#.NET source code file
Answer: Option C
What is the purpose of the "using" keyword in C#?
A. To define namespaces
B. To declare variables
C. To import external libraries
D. To create instances of classes
What does the "break" keyword do in a switch statement?
A. Exits the switch statement
B. Skips the current iteration
C. Continues to the next iteration
D. Throws an exception
Which of the following is NOT a valid C# access modifier?
A. public
B. internal
C. protected
D. private
What is the purpose of the "readonly" keyword in C#?
A. To declare a constant
B. To prevent a variable from changing
C. To allow a variable to be changed
D. To declare a static variable

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