Fall 2000 - Fall 2000 Final Exam Name Part 1 Answer...

Fall 2000
Final Exam
Name:
Part 1. Answer True/False (T/F) (1 point each)
____ Spin-locks need kernel support.
____ Semaphores should be initialized with numbers greater than 0.
____ The number of page tables in a computer is equal to the number of CPUs.
____ All threads in a process share the same page table.
____ In segment-swap entire processes are swapped in and out from disk.
____ The page-table register is updated every time there is a context switch from one
thread to another.
____ Page sizes are always a power of two.
____ In demand paging a virtual address is divided into page number and page offset.
____ A physical page that is replaced is always written back to the backing store.
____ All virtual memory is backed by swap space.
____ The flag PTHREAD_SCOPE_PROCESS is used to create a kernel thread.
____ a.out is an executable format used on Windows.
____ truss is a command to transfer files in UNIX systems.
____ The data section of a program is memory mapped readable, writable and
executable.
____ Most of the processes in a computer are in ready state.
____ There is at most one running process in the computer.
____ Most of the CPU time is spent in kernel mode.
____ TLBs speed up the translation from physical to virtual addresses.
____ A small time quantum will cause a program to take more time.
____ The arguments of a system call are checked in user space.
____ In non-preemptive scheduling a program may have a context switch at any time.
____ A program that runs with preemptive scheduling runs faster than one in non-
preemptive scheduling.