Exception Handling - General Questions

What is the output of the following program?

try
{
    int[] a = new int[2];
    a[5] = 1;
}
catch (IndexOutOfRangeException) { Console.Write("index"); }
catch (Exception) { Console.Write("other"); }

What is the base class of all exceptions in C#?

What is the output of the following program?

try { int z = 0; Console.Write(10 / z); }
catch (DivideByZeroException) { Console.Write("D"); }
finally { Console.Write("F"); }

What is the difference between 'throw;' and 'throw ex;' inside a catch block?

Which keyword is used to raise an exception?