Answer: PID of child
process.
Process ID: Each
process in the OS has its own unique identifier.
A program can be
divided into four pieces when put into memory to become a process: stack, heap,
text, and data.
Stack - Temporary
data like method or function parameters, return address, and local variables
are stored in the process stack.
Heap - This
is the memory that is dynamically allocated to a process during its execution.
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