Does a program use the same cpu registers everytime it is run?

Question

When a program is run it uses the various registers eax, ebx etc. to store and move data.

Does a program use the same registers every time it is run?

Can the registers it does or does not use be found?

Answer 1

If it is compiled to machine code, it will use the same registers all the time. If it is interpreted or compiled to byte code (think Java or C#) it can use different registers on each run.