Which two statements are true concerning a monolithic kernel? OA. For efficiency it is typically executed as a single-threaded process. OB. It typically resides in a single address space in memory. OC. It resides in both protected and user areas of memory. OD. It must be able to suspend and resume execution of itself. Which two statements are true? Compared to a monolithic kernel, a microkernel... OA. has better support for code reusability. OB. is more efficient. OC. is less modular. OD. has a smaller memory footprint if you just consider the kernel itself. Which two statements are true about multitasking in a timesharing system? OA. Multiple users have access to the CPU simultaneously. OB. Multitasking will reduce user response time at the expense of CPU efficiency. OC. Multitasking can improve both processor utilization and user response time. OD. It allows multiple users to share processor and hardware time. Which two statements are true? In a multi-threaded process OA. there will be multiple processes within one process. OB. the process has one runtime stack that each thread shares. OC. the process has one PID (process ID). OD. from the user's perspective all threads are running concurrently. Which two facilities are needed for a multiprogrammed batch processing system? OA. a processor mode switch OB. a timer on the processor Cc. symmetric multiprocessing DD. pipelining