Question 11

An interface member that is explicitly implemented can be accessed only through an instance of the interface, not from a class instance

True

False

Question 12

Find correct statement about the code?

class sample

{

int i = 10;

int j = 20;

public void display()

{

Console.WriteLine("base method ");

}

}

class sample1 : sample

{

public int s = 30;

}

class Program

{

static void Main(string[] args)

{

sample1 obj = new sample1();

Console.WriteLine("{0}, {1}, {2}", obj.i, obj.j, obj.s);

obj.display();

Console.ReadLine();

}

}

10, 20, 30 Base method

10, 20, 0

Compile time error

Base method

Question 13

Does .NET support the ability to inherit multiple interfaces?

Yes

No

No answer text provided.

No answer text provided.

Question 14

Which statement best describes the relationship between base class and derived class types?

A derived class reference cannot be assigned to a base class variable and a base class reference cannot be assigned to a derived class variable.

A derived class reference can be assigned to a base class variable and a base class reference can be assigned to a derived class variable.

A base class reference can be assigned to a derived class variable, but a derived class reference cannot be assigned to a base class variable

A derived class reference can be assigned to a base class variable, but a base class reference cannot be assigned to a derived class variable

Question 15

Classes which implement the IEnumerator interface must contain which of the following methods?

A) MoveNext

B) Reset

C) Current

D) Reverse

A, B, C

B, C, D

A, B, D

A, C, D

Question 16

Which of the following is true regarding a sealed class?

It is ready to be serialized.

It is packaged in a DLL.

It cannot be inherited.

It may not reference any classes in the .NET library.

Question 17

The class SmithKarenCreature inherits from the class Creature . An instance of SmithKarenCreature is created and referenced in the variable kCreature using the following code: SmithKarenCreature kCreature = new SmithKarenCreature();

A variable called creature of type Creature is declared and kCreature is cast as type Creature and assigned to creature using the following line of code:

Creature creature = (Creature)kCreature;

Which of the following is an alternative syntax to the above line of code?

Creature creature = Creature as kCreature;

Creature creature = kCreature as Creature;

Creature (SmithKarenCreature) creature = kCreature;

Creature creature = (SmithKarenCreature as Creature) kCreature;

Question 18

In C# all non-static methods are by default virtual functions.

True

False

No answer text provided.

No answer text provided.

Question 19

An abstract method can only be declared in a class that is declared as abstract.

True

False

Question 20

It is an error to use both new and override on the same member because the two modifiers have mutually exclusive meanings. The new modifier creates a new member with the same name and causes the original member to become hidden. The override modifier extends the implementation for an inherited member.

True

False