estion: What is the purpose of the "fork" system call in Unix-like operating systems?A) To create a new processB) To terminate a processC) To wait f
Question
estion: What is the purpose of the "fork" system call in Unix-like operating systems?A) To create a new processB) To terminate a processC) To wait f
Solution
The purpose of the "fork" system call in Unix-like operating systems is to create a new process.
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Consider the following fragment of a program: ... int a=0; int main() { a = 1; int pid=fork(); if(pid == 0) { printf("%d\n", a); } else if(pid > 0) { printf("%d\n", a); } return 0; } When run, what output do you observe and what do you think is the reason for the observed output? You may assume that the call to fork() succeeds. Question 4 Select one: a. The parent process outputs 1, but the child process outputs 0, because the value of a is updated only in the parent process. b. Both the parent and the child processes output 1, because the child process inherits the memory state from the parent at the point where fork() is called, and the variable a has been assigned the value 1 at that point. c. The parent process outputs 0, but the child process outputs 1, because the value of a is updated only in the child process.
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