Classes and Objects in C Sharp MCQs with Answers 2027

Q221

Which of the following is the correct result for the given statement in the C#.NET statement given below?
p = q

struct employee
{
    private int employee id;
    private string city;
}
employee q = new employee();
employee p;
p = q;

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Q222

Open question

The operator used to access member function of a class?

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Q223

Open question

Select the statement which should be added to the current C# code to get the output as 10 20?

class baseclass
{
    protected int a = 20;
}
class derived : baseclass
{
    int a = 10;
    public void math()
    {
         /* add code here */
    }   
}

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Q224

Open question

Which among the following cannot be used as a datatype for an enum in C#.NET?

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Q225

Open question

Which of the following statements about objects in "C#" is correct?

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Q226

Open question

Which of these data types is used by the operating system to manage the Recursion in Csharp?

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Q227

Open question

What will be the output of the following C# code?

interface calc
{
    void cal(int i);
}
class displayA :calc 
{
    public int x;
    public void cal(int i) 
    {
        x = i * i;            
    }
}
class displayB :calc
{
    public int x;
    public void cal(int i)
    {
        x = i / i;
    }
}
class Program
{
    public static void Main(string[] args)
    {            
        displayA arr1 = new displayA();
        displayB arr2 = new displayB();
        arr1.x = 0;
        arr2.x = 0;
        arr1.cal(2);
        arr2.cal(2);
        Console.WriteLine(arr1.x + " " + arr2.x);
        Console.ReadLine();
    }
}

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Q228

Open question

Select correct differences between '=' and '==' in C#.

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Q229

Open question

The modifier used to hide the base class methods is?

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Q230

Open question

What will be the output of the following C# code?

class box
{
    public int volume;
    int width;
    int height;
    int length;
    public box ( int w, int h, int l)
    {
        this.width = w;
        this.height = h;
        this.length = l;
    }
    ~ box()
    {
        volume = this.width * this.length * this.height;
        console.writeline(volume);
    }
}    
class Program
{
    public  static void Main(string[] args)
    {
        box b = new box(4, 5, 9);
        Console.ReadLine();
    }
}

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Q231

Open question

Wrong statement about inheritance in C# .NET?

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Q232

Open question

Correct way of declaration of object of the following class is?

class name

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Q233

Open question

Select the sequence of execution of function f1(), f2() & f3() in C# .NET CODE?

class base
{
    public void f1() {}
    public virtual void f2() {}
    public virtual  void f3() {}
}
class derived :base
{
    new public void f1() {}
    public override void f2() {}
    public new void f3() {}
} 
class Program
{
    static void Main(string[] args)
    {
        baseclass b = new derived();
        b.f1 ();
        b.f2 ();
        b.f3 ();
    }
}

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Q234

Open question

The following C# code is run on single level of inheritance. What will be the Correct statement in the following C# 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();
    }
}

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Q235

Open question

What is the return type of constructors?

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Q236

Open question

Which keyword is used for correct implementation of an interface in C#.NET?

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Q237

Open question

What will be the output of the following C# code?

public static void Main(string[] args)
{
    p();
    void p()
    {
        Console.WriteLine("hi");
    }
}

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Q238

Open question

Can the method add() be overloaded in the following ways in C#?

public int add()  {    }
public float add(){    }

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Classes and Objects in C Sharppractice.

Classes and Objects in C Sharp
practice.