Classes and Objects in C Sharp MCQ question and answer with solution | C# Program MCQs

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71.
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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72.
Choose the correct statement about structures as to why they are defined as value types but not reference types?

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73.
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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75.
Which statement correctly defines Interfaces in C#.NET?

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76.
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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77.
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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78.
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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79.
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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