i work with unix server 11.31. Now i want to move my binaries to unix 11.11. I am confused will those binaries will work in 11.11 since there was some signal changes and configuration changes in newer version.
Binary compatibility is only usually guaranteed on forward versions (i.e. binaries compiled on version xx.1 will run on xx.2). I do not specifically know how HP handles this for HP-UX, but I would expect it not to guarantee backward binary compatibility.
You would be safer off re-compiling your code against the previous version.
Or, you could move the binaries and see if they run - might be quickest.
More info on some HP-UX binary compatibility stuff here.