Miscellaneous in C Sharp
practice.

Accessibility modifiers defined in a class are?

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

class Program
{
    static void Main(string[] args)
    {
        int[] nums = {3 ,1 ,2 ,5 ,4};
        var ltAvg = from n in nums
                    let x = nums.Average()
                    where n < x
                    select n;
        Console.WriteLine("The average is " + nums.Average());
        Console.ReadLine();
    }
}

What is mutex?

Which of these constructors is used to create an empty String object?

Which among the following is a .NET namespace?

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

class Program
{
    static void Main(string[] args)
    {
        String c = "Hello i love Csharp";
        Boolean var;
        var = c.StartsWith("hello");
        Console.WriteLine(var);
        Console.ReadLine();
    }
}

What will be the following C# code snippet specify?

class MyClass
{
    char chrs = 'A' ;
    public IEnumerator GetEnumerator()
    {
        for (int i = 20; i >=0; --i)
        if (i == 10) yield break;
        yield return (char)((chrs + i));
    }
}
class Program
{
    static void Main(string[] args)
    {
        MyClass mc = new MyClass();
        foreach (char ch in mc)
        Console.Write(ch + " ");
        Console.WriteLine();
        Console.ReadLine();
    }
}

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

class Program
{
    static void Main(string[] args)
    {
        String s1 = "one";
        String s2 = string.Concat(s1 + " " + "two");
        Console.WriteLine(s2);
        Console.ReadLine();
    }
}

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

class UnsafeCode
{
    unsafe static void Main()
    {
        int* ptrs = stackalloc int[3];
        ptrs[0] = 1;
        ptrs[1] = 2;
        ptrs[2] = 3;
        for (int i = 2; i >= 0; --i)
        {
            ptrs[i] = ptrs[i]* 3;
            ptrs[i] = ptrs[i] + 4;
            Console.WriteLine(ptrs[i]);
        }
        Console.ReadLine();
    }
}

Choose the base class for string() method.

Which of these operators can be used to concatenate two or more String objects?

What does the yield return statement specify in the following C# code snippet?

public System.Collections.IEnumerator GetEnumerator()
{
    foreach (char ch in chrs)
    yield return ch;
}

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

class Program
{
    static void Main(string[] args)
    {
        int y = (int)Math.Max(4,2);
        int z = (int)Math.Pow(y, 2);
        Console.WriteLine(z);
        Console.ReadLine();
    }
}

In which of the following collections is the I/O based on a key?

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

class UnsafeCode
{
    unsafe static void Main()
    {
        int m = 10;
        int *mptr = &m;
        int **ptr = &mptr;
        int n = 20;
        int *nptr = &n;
        int **prt = &nptr;
        m = **prt + *nptr;
        n = *mptr* **prt;
        Console.WriteLine(n + " " + m);
        Console.ReadLine();
    }
}

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

class Program
{
    static void Main(string[] args)
    {
        double x = 3.14;  
        int y = (int) Math.Abs(x);
        Console.WriteLine(y);
    }
}

Which among the following is not a preprocessor directive?

Which among the following is the correct way to find out the number of elements currently present in an ArrayListCollection called arr?

Which of these method returns a smallest whole number greater than or equal to variable X?

Which statement is correct in the following C#.NET code snippet?

Stack st = new Stack();
st.Push("Csharp");
st.Push(7.3);
st.Push(8);
st.Push('b');
st.Push(true);