Classes and Objects in C Sharp MCQs with Answers 2027

Q161

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

class maths
{
    public int length;
    public int breadth;
    public  maths(int x)
    {
        length = x + 1;
    }
    public maths(int x, int y)
    {
        length = x + 2;
    }
}
class Program
{
    static void Main(string[] args)
    {
        maths m = new maths(6);
        maths k = new maths(6, 2);
        Console.WriteLine(m.length);
        Console.WriteLine(k.length);
        Console.ReadLine();
    }
}

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Q162

Open question

Which of the following cannot be used to declare an interface correctly?

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Q163

Open question

In an inheritance chain through which of the following, the base class and its components are accessible to the derived class?

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Q164

Open question

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

public class sample
{
    public static int x = 100;
    public static int y = 150;

}
public class newspaper :sample
{
    new public static int x = 1000;
    static void Main(string[] args)
    {
        console.writeline(sample.x + "  " + sample.y + "  " + x);
    }
}

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Q165

Open question

Which of the following is used to define the member of a class externally?

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Q166

Open question

Which of these can be overloaded?

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Q167

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)
    {
        width = w;
        height = h;
        length = l;
    }
   public ~box()
   {
       volume = width * length * height;

   }

}    
class Program
{
    static void Main(string[] args)
    {
       box b = new box(4, 5, 9);
       Console.WriteLine(b.volume);
       Console.ReadLine();
   }
 
}

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Q168

Open question

Operator used to free the memory when memory is allocated?

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Q169

Open question

Choose the statements which makes interface different from classes?

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Q170

Open question

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

using System;
public class BaseClass
{
    public BaseClass()
    {
        Console.WriteLine("I am a base class");
    }
}
public class ChildClass : BaseClass
{
    public ChildClass()
    {
        Console.WriteLine ("I am a child class");
    }
static void Main()
{
    ChildClass CC = new ChildClass();
}
}

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Q171

Open question

What will be the Correct statement in the following C# code?

class sample
{
    protected int index;
    public sample()
    {
        index = 0;
    }
}
class sample 1: sample
{
    public void add()
    {
        index += 1;
    }
}
class Program
{
    static void Main(string[] args)
    {
        sample 1 z = new sample 1();
        z . add();
    }
}

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Q172

Open question

Choose the correct statement about structures as to why they are defined as value types but not reference types?

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Q173

Open question

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

class A
{
    public int i;
    public void display() 
    {
        Console.WriteLine(i);
    }
}    
class B: A 
{
    public int j;
    public void display() 
    {
        Console.WriteLine(j);
    }
}    
class Program
{
    static void Main(string[] args)
    {
        B obj = new B();
        obj.i = 1;
        obj.j = 2;
        obj.display();
        Console.ReadLine();
    }
}

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Q174

Open question

Does C#.NET support partial implementation of interfaces?

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Q175

Open question

Which statement correctly defines Interfaces in C#.NET?

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Q176

Open question

What will be the correct statement in the following C# code?

class trial
{
    int i;
    float d;
}
struct sample
{
    private int x;
    private Single y;
    private trial z;
}
sample s = new sample();

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Q177

Open question

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

namespace ConsoleApplication4
{
    abstract class A
    {
        public int i ;
        public int j ;
        public abstract void display();
    }    
    class B: A    
    {
        public int j = 5;
        public override void display() 
        {
            this.j = 3;
            Console.WriteLine(i + "  " + j);
        }
    }    
    class Program
    {
        static void Main(string[] args)
        {
            B obj = new B();
            obj.i = 1;
            obj.display();     
            Console.ReadLine();
        }
    }
}

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Q178

Open question

What will be the correct statement in the following C# code?

struct book
{
    private String name;
    private int pages;
    private Single price;
}
book b = new book();

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Q179

Open question

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

static void Main(string[] args)
{
    int x = 8;
    int b = 16;
    int C = 64;
    x /= b /= C;
    Console.WriteLine(x + " " + b+ " " +C);
    Console.ReadLine();
}

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Q180

Open question

Which procedure among the following should be used to implement a 'Has a' or a 'Kind of' relationship between two entities?

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Classes and Objects in C Sharppractice.

Classes and Objects in C Sharp
practice.