Motherboards have a speaker on them, that's where the POST beeps come from.

If you're getting beeped during operations, it's usually a sign of some problem. Overheating is a common cause.

You...

You've pretty much answered your first question - the >> and << operators are shifting the bits of the initial value of x.

In binary, the byte that stores decimal 5 is 0000 0101. Shift that left...