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TI504M - Computer Architecture and Operating Systems
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What is the PID of the parent process?
The previous program displays the following output:
hdd@lea:~$ ./a.out
Is the display below correct:
13237 13237 13238 13237 13238 13239 13237 13238 13239 13240 13237 13238 13239 13240 13241
Which process executes the last for loop containing the calls to waitpid()?
In this program:
What is the PID of the last created child?
The execution time of the program is:
What is the PID of the first created child?
Under the SHELL, how many input/output streams are there?
The following code:
char* myreader(int fd){ int cmp = 0; char c; while(read(fd, &c, 1) == 1 && c!= '\n') cmp++; char *ch = (char*) malloc (cmp+1); lseek(fd, 0, SEEK_SET); read(fd, ch, cmp); ch[cmp] = 0; return ch; }
Determine the value of x in the following program:
int main() { int x = 1; int pid = fork(); if (pid != 0) { printf("x=%d\n", ++x); exit(0); } printf("x=%d\n", --x); exit(0); }