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  • Interfaces - General Questions
1. 

Which of the following statements is correct about the C#.NET code snippet given below? 

interface IMyInterface
{ 
    void fun1(); 
    int fun2();
}
class MyClass: IMyInterface
{ 
    void fun1()
    { } 
    int IMyInterface.fun2()
    { } 
}
A. A function cannot be declared inside an interface.
B. A subroutine cannot be declared inside an interface.
C. A Method Table will not be created for class MyClass.
D. MyClass is an abstract class.
E. The definition of fun1() in class MyClass should be void IMyInterface.fun1().
2. 

Which of the following can be declared in an interface?

  1. Properties
  2. Methods
  3. Enumerations
  4. Events
  5. Structures

A. 1, 3
B. 1, 2, 4
C. 3, 5
D. 4, 5
3. 

A class implements two interfaces each containing three methods. The class contains no instance data. Which of the following correctly indicate the size of the object created from this class?
A. 12 bytes
B. 24 bytes
C. 0 byte
D. 8 bytes
E. 16 bytes
4. 

Which of the following statements is correct about an interface used in C#.NET?
A. One class can implement only one interface.
B. In a program if one class implements an interface then no other class in the same program can implement this interface.
C. From two base interfaces a new interface cannot be inherited.
D. Properties can be declared inside an interface.
E. Interfaces cannot be inherited.
5. 

Which of the following statements is correct about Interfaces used in C#.NET?
A. All interfaces are derived from an Object class.
B. Interfaces can be inherited.
C. All interfaces are derived from an Object interface.
D. Interfaces can contain only method declaration.
E. Interfaces can contain static data and methods.