The question about xv6 and Linux. Thank you

Q1: Define a process and how it differs from a thread.

Q2: How many entries are there in a page table using 4KB pages for a 64-bit virtual address space? Would a single level page table of this size fit in the RAM of a modern desktop computer? If not, name two alternative page table configurations that could be used to handle an address space of this size.

Q3: consider the code snippet below:

#include #include int main() {

int pid = fork();

if (pid > 0) {

printf("parent: pid=%d ", pid);

wait(0);

printf("child is done ");

}

else if (pid == 0) {

printf("child: exiting ");

exit(0); }

else { printf("fork error");

}

}

Assuming pid of parent in fork call is 18007, write (in order they would appear in output) the 3 lines of output produced by the 3 calls to printf above.