MCQOPTIONS

Explore topic-wise MCQs in C Sharp Programming.

This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your C Sharp Programming knowledge and support exam preparation. Choose a topic below to get started.

1.	Which of the following statements are correct about an interface in C#.NET? A class can implement multiple interfaces. Structures cannot inherit a class but can implement an interface. In C#.NET, : is used to signify that a class member implements a specific interface. An interface can implement multiple classes. The static attribute can be used with a method that implements an interface declaration.
A.	1, 2, 3
B.	2, 4
C.	3, 5
D.	None of the above.
Answer» B. 2, 4

2.	Which of the following statements is correct about an interface?
A.	One interface can be implemented in another interface.
B.	An interface can be implemented by multiple classes in the same program.
C.	A class that implements an interface can explicitly implement members of that interface.
D.	The functions declared in an interface have a body.
Answer» D. The functions declared in an interface have a body.

3.	Which of the following is the correct implementation of the interface given below? interface IMyInterface { double MyFun(Single i); }
A.	class MyClass { double MyFun(Single i) as IMyInterface.MyFun { // Some code } }
B.	class MyClass { MyFun (Single i) As Double { // Some code } }
C.	class MyClass: implements IMyInterface { double fun(Single si) implements IMyInterface.MyFun() { //Some code } }
D.	class MyClass: IMyInterface { double IMyInterface.MyFun(Single i) { // Some code } }
Answer» E.

4.	Which of the following can implement an interface? Data Class Enum Structure Namespace
A.	1, 3
B.	2, 4
C.	3, 5
D.	4 only
Answer» C. 3, 5

5.	Which of the following statements is correct about the C#.NET code snippet given below? interface IMyInterface { void fun1(); void fun2(); } class MyClass: IMyInterface { private int i; void IMyInterface.fun1() { // Some code } }
A.	Class MyClass is an abstract class.
B.	Class MyClass cannot contain instance data.
C.	Class MyClass fully implements the interface IMyInterface.
D.	Interface IMyInterface should be inherited from the Object class.
Answer» E.

6.	Which of the following is the correct way to implement the interface given below? interface IPerson { String FirstName { get; set; } }
A.	class Employee : IPerson { private String str; public String FirstName { get { return str; } set { str = value; } } }
B.	class Employee { private String str; public String IPerson.FirstName { get { return str; } set { str = value; } } }
C.	class Employee : implements IPerson { private String str; public String FirstName { get { return str; } set { str = value; } } }
D.	None of the above
Answer» B. class Employee { private String str; public String IPerson.FirstName { get { return str; } set { str = value; } } }

7.	Which of the following statements is correct about the C#.NET code snippet given below? interface IPerson { String FirstName { get; set; } String LastName { get; set; } void Print(); void Stock(); int Fun(); }
A.	Properties cannot be declared inside an interface.
B.	This is a perfectly workable interface.
C.	The properties in the interface must have a body.
D.	Subroutine in the interface must have a body.
Answer» C. The properties in the interface must have a body.

8.	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.
Answer» C. All interfaces are derived from an Object interface.

9.	Which of the following statements are correct about an interface used in C#.NET? An interface can contain properties, methods and events. The keyword must implement forces implementation of an interface. Interfaces can be overloaded. Interfaces can be implemented by a class or a struct. Enhanced implementations of an interface can be developed without breaking existing code.
A.	1, 2
B.	1, 4, 5
C.	3, 4
D.	3 only
Answer» C. 3, 4

10.	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
Answer» C. 0 byte

11.	Which of the following statements is correct about an interface used in C#.NET?
A.	If a class implements an interface partially, then it should be an abstract class.
B.	A class cannot implement an interface partially.
C.	An interface can contain static methods.
D.	An interface can contain static data.
Answer» B. A class cannot implement an interface partially.

12.	Which of the following can be declared in an interface? Properties Methods Enumerations Events Structures
A.	1, 3
B.	1, 2, 4
C.	3, 5
D.	4, 5
Answer» C. 3, 5

13.	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.
Answer» E.