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Question 1: (5 Marks)
Identify and explain which of the following state is being shared between parent and the child process when a process creates a new process using the fork() operation
b) Shared Memory Segment
Question 2: (5 Marks)
Consider UltraSPARC processor that has multiple register sets, if a new context is already loaded into one of the register then describe the action to be needed by context switch. Also describe that what will happen if new context is loaded into the memory rather than in register set and all registers are in use?
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Deadline: Your assignment must be uploaded/submitted on or before 20th May 2015.
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Only the shared memory segments are shared between the
parent process and the newly forked child process. Copies of the stack
and the heap are made for the newly created process
The parent and child share only the shared memory segments. Everything else is duplicated, but
the child has its own versions (changes it makes won’t be visible to the parent, and vice-versa
The CPU current-register-set pointer is changed to point to the
set containing the new context,which takes very little time. If the context
is in memory, one of the contexts in a register set must be chosen and be
moved to memory, and the new context must be loaded from memory into the set. This process takes a little more time than on systems with one set of registers, depending on how a replacement victim is selected.
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