Today I was looking at a Sun Certified Java Programmer example test (quite an old one - url no longer valid). There were some quite curious questions. I have taken out and modified questions that apply to C# (unless otherwise noted) and left out Java specific ones. Try to guess the compilation result/output! Here they are in C# version:

1.
     int i = 1;
     i <<= 31;
     i >>= 31;
     Console.WriteLine(i);
2.
     Console.WriteLine(Double.NaN == Double.NaN);

     double zero = 0;
     Console.WriteLine(Double.NaN == 3 / zero);
3.
     int i = 10;
     int j = 10;
     bool b = false;

     if (b = 10 == 10)
         Console.WriteLine("true");
     else
         Console.WriteLine("false");
4. This one behaves differently in Java and C#
Java:
     System.out.println(-0.0);
     System.out.println(-0.0 == +0.0);
     System.out.println(Math.min(-0.0,+0.0));
     System.out.println(Math.max(-0.0,+0.0));
     System.out.println(Math.min(-0.0,+0.0) == Math.max(0.0,+0.0));
C#:
     Console.WriteLine(-0.0);
     Console.WriteLine(-0.0 == +0.0);
     Console.WriteLine(Math.Min(-0.0, +0.0));
     Console.WriteLine(Math.Max(-0.0, +0.0));
     Console.WriteLine(Math.Min(-0.0, +0.0) == Math.Max(0.0, +0.0));
5.
     int i = 0;
     Console.WriteLine(i++ + ++i);
     Console.WriteLine(i++ + i++);
6.
     Console.WriteLine(Double.PositiveInfinity + Double.NegativeInfinity);
     Console.WriteLine(Double.PositiveInfinity == Double.PositiveInfinity);

Check the full article for the actual output!

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