Classes and Objects in C Sharp MCQs with Answers 2027

Q121

Open question

Which of these will happen if the recursive method does not have a base case?

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Q122

Open question

Which operator among the following signifies the destructor operator?

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Q123

Open question

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

static void Main(string[] args)
{
    int []a = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
    func(ref a);
    Console.ReadLine();
}
static void func(ref int[] x)
{
    Console.WriteLine(" numbers are:");
    for (int i = 0; i < x.Length; i++)
    {
        if (x[i] % 2 == 0)
        {
            x[i] = x[i] + 1;
            Console.WriteLine(x[i]);
        }
    }
}

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Q124

Open question

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

enum letters
{
    a,
    b,
    c
} 
letters l;
l = letters.a;
Console.writeline(l);

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Q125

Open question

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

static void Main(string[] args)
{
    int y = 3;
    y++;
    if (y <= 5)
    { 
        Console.WriteLine("hi");
        Main(args);
    }
    Console.ReadLine();
}

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Q126

Open question

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

class maths
{
    public int fun(int ii)
    {
        return(ii > 0 ? ii :ii * -1);
    }
    public long fun(long ll)
    {
        return(ll > 0 ? ll :ll * -1);
    }
    public double fun( double dd)
    {
        return(dd > 0 ? dd :dd * -1);
    }
}    
class Program
{
    static void Main(string[] args)
    {
        maths obj = new maths();
        int i = -25;
        int j ;
        long l = -100000l ;
        long m;
        double d = -12.34;
        double e;
        j = obj.fun(i);
        m = obj.fun(l);
        e = obj.fun(d);
        Console.WriteLine(j + "  " + m + "  " + e);
        Console.ReadLine();
    }
}

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Q127

Open question

In Inheritance concept, which of the following members of base class are accessible to derived class members?

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Q128

Open question

Choose the wrong statement about structures in C#.NET?

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Q129

Open question

A type of class which does not have its own objects but acts as a base class for its subclass is known as?

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Q130

Open question

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

class maths
{
    public int fun1(int k)
    {
        k = 20;
        return k;
    }
    public Single fun1(float t)
    {
        t = 3.4f;
        return t;
    }
}  
class Program
{
    static void Main(string[] args)
    {
        maths obj = new maths();
        int i;
        i = obj.fun1(30);
        Console.WriteLine(i);
        Single j;
        j = obj.fun1(2.5f);
        Console.WriteLine(j);
        Console.ReadLine();
    }
}

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Q131

Open question

What is the vector in operator overloading?

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Q132

Open question

The number of levels of inheritance are?

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Q133

Open question

A class member declared protected becomes member of subclass of which type?

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Q134

Open question

Select the wrong statement about 'ref' keyword in C#?

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Q135

Open question

Which of these operators must be used to inherit a class?

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Q136

Open question

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

class sample
{
    int i;
    double k;
    public sample (int ii, double kk)
    {
        i = ii;
        k = kk;
        double j = (i) + (k);
        Console.WriteLine(j);
    }
    ~sample()
    {
        double j = i - k;
        Console.WriteLine(j);
    }
}
  class Program
  {
      static void Main(string[] args)
      {
          sample s = new sample(8, 2.5);
          Console.ReadLine();
      }
  }

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Q137

Open question

The modifier used to define a class which does not have objects of its own but acts as a base class for its subclass is?

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Q138

Open question

Correct statement about constructor overloading in C# is?

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Q139

Open question

Select the correct statement among the given statements?

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Q140

Open question

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

class maths 
{
    int fact(int n) 
    {
        int result;
        if (n == 1)
        return 1;
        result = fact(n - 1) * n;
        return result;
    }
} 
class Output 
{
    static void main(String args[]) 
    {
        maths obj = new maths() ;
        Console.WriteLine(obj.fact(4)*(3));
    }
}

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Classes and Objects in C Sharppractice.

Classes and Objects in C Sharp
practice.