It's a pretty much common question asked in most of the interviews related to Linux, and most of the time people got it confused with Zombie Process. But these two are totally different from each other. An Orphan Process is nearly the same thing which we see in real world. Orphan means someone whose parents are dead. The same way Orphan process is a process, whose parents are dead, that means parents are either terminated, killed or exited but the child process is still alive.