In this question, assume a standard system with isolation and memory protection. Further assume that the thread abstraction is implemented by the operating system. That is, thread_create() is a system call. 1. What do you think are the differences between the implementation of thread_create(func) and the implementation of fork()? (here, func is the address of the function that the thread should begin at). 2. What do you think are the key differences between the OS's "process" data structure and whatever data structure it uses to implement a thread?

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A: Answer is

Q: Here, a solution that uses a single thread is preferable than one that uses several threads.

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Q: So, what does it mean when someone says there are "many processes" as opposed to "many threads"? Can…

A: Here is explanation about "many processes" and "many threads".

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Race Condition

A race condition occurs within a critical section when two or more tasks try to access and alter a shared resource simultaneously. As a consequence, the process changes to a state of inconsistency.