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

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12.
What will be the output of the following C# code snippet?
class UnsafeCode
{
    unsafe static void Main()
    {
        int[] nums = new int[10];
        fixed (int* p = &nums[0], p2 = nums)
        {
            if (p == p2)
            Console.WriteLine("p and p2 point to same address.");
            Console.ReadLine();
        }
    }
}

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13.
Which among the following is the correct way to access all the elements of the Stack collection created using the C#.NET code snippet given below?
Stack st = new Stack();
st.Push(10);
st.Push(20);
st.Push(-5);
st.Push(30);
st.Push(6);

IEnumerable e;
e = st.GetEnumerator();
while (e.MoveNext())
Console.WriteLine(e.Current);

IEnumerator e;
e = st.GetEnumerator();
while(e.MoveNext())
Console.WriteLine(e.Current);

IEnumerable e;
e = st.GetEnumerable();
while(e.MoveNext())
Console.WriteLine(e.Current);

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14.
What will be the output of the following C# code snippet?
class UnsafeCode
{
    static void Main()
    {
        int count = 100;
        int? result = null;
        int incr = 10;
        result = count + incr;
        if (result.HasValue)
            Console.WriteLine("result has this value: " + result.Value);
        else
            Console.WriteLine("result has no value");
        Console.ReadLine();
    }
}

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15.
What will be the output of the following C# code snippet?
class Program
{
    static void Main(string[] args)
    {
        int[] nums = { 1 };
        var posNums = from n in nums
                      select Math.Pow(4 ,3);
        Console.Write("The values in nums: ");
        foreach (int i in posNums) 
        Console.Write(i + " ");
        Console.WriteLine();
        Console.ReadLine();
    }
}

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16.
What will be the output of the following C# code snippet?
class access
{
    public int x;
    private int y;
    public  void cal(int a, int b)
    {
        x = a + 1;
        y = b;
    }
}    
class Program
{
    static void Main(string[] args)
    {
        access obj = new access();   
        obj.cal(2, 3);
        Console.WriteLine(obj.x + " " + obj.y);     
    }
}

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17.
What will be the output of the following C# code snippet?
class UnsafeCode
{
    unsafe static void Main()
    {
        char[] arr = { 'A', 'B', 'C', 'D', 'E' };
        fixed (char* P = arr)
        {
            int i;
            for (i = 0 ;i < 5 ;i++)
            if (*P % 2 == 0)
            ++*P;
            else
            (*P)++;
            Console.WriteLine(arr);
        }
        Console.ReadLine();
    }
}

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19.
What will be the output of the following C# code snippet?
class Program
{
    static void Main(string[] args)
    {
        String s1 = "Hello i love Csharp";
        StringBuilder s2 = new  StringBuilder(s1);
        Console.WriteLine(s1.Equals(s2));
        Console.ReadLine();
    }
}

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20.
A HashTable t maintains a collection of names of states and capital city of each state. Which among the following finds out whether "New delhi" state is present in the collection or not?

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