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A total of 8 processes are created by the script.
The process forks at each fork(), thus not only does the original parent process fork but also its child processes. That is, since at at each fork() the number of existing processes is doubled, a total of 2 to the
power of 3 processes result.
6 unique processes are created; the parent is forked (2), and the child is forked yet again (1+2=3). All processes are forked again (3*2=6).
8 unique threads are created. All unique processes are threads themselves (6), additionally, off the original process the child is forked; an additional thread is created, for each of the two (6+2=8)....
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