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- Question
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(); }
Options- 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.
- E. Functions cannot be declared inside an interface.
- Correct Answer
- This is a perfectly workable interface.
- 1. Which of the following can be declared in an interface?
- Properties
- Methods
- Enumerations
- Events
- Structures
Options- A. 1, 3
- B. 1, 2, 4
- C. 3, 5
- D. 4, 5 Discuss
- 2. 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.
Options- A. 1, 2
- B. 1, 4, 5
- C. 3, 4
- D. 3 only Discuss
- 3. 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() { } }
Options- 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(). Discuss
- 4. Which of the following statements is correct about an interface?
Options- 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. Discuss
- 5. Which of the following can implement an interface?
- Data
- Class
- Enum
- Structure
- Namespace
Options- A. 1, 3
- B. 2, 4
- C. 3, 5
- D. 4 only Discuss
- 6. 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 } }
Options- 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.
- E. The compiler will report an error since the interface IMyInterface is only partially implemented. Discuss
- 7. Which of the following is the correct implementation of the interface given below?
interface IMyInterface { double MyFun(Single i); }
Options- 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 } }
Discuss
- 8. Which of the following statements is correct about an interface used in C#.NET?
Options- 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.
- E. Multiple interface inheritance is not allowed. Discuss
- 9. Which of the following is the correct way to implement the interface given below?
interface IPerson { String FirstName { get; set; } }
Options- 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 Discuss
- 10. Which of the following statements is correct about an interface used in C#.NET?
Options- 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. Discuss
Interfaces problems
Search Results
Correct Answer: 1, 2, 4
Correct Answer: 1, 4, 5
Correct Answer: The definition of fun1() in class MyClass should be void IMyInterface.fun1().
Correct Answer: A class that implements an interface can explicitly implement members of that interface.
Correct Answer: 2, 4
Correct Answer: The compiler will report an error since the interface IMyInterface is only partially implemented.
Correct Answer:
class MyClass: IMyInterface
{
double IMyInterface.MyFun(Single i)
{
// Some code
}
}Correct Answer: If a class implements an interface partially, then it should be an abstract class.
Correct Answer:
class Employee : IPerson
{
private String str;
public String FirstName
{
get
{
return str;
}
set
{
str = value;
}
}
}Correct Answer: Properties can be declared inside an interface.
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