Quick OS question?

1. A bit map for managing the sectors on a disk with 144 sectors would be:


(A) 1440 bytes long. (B) 18 bytes long. (C) 180 bytes long. (D) None of A,B,C.





2. An alarm monitoring computer system has remote alarms which signal the computer system by sending serial data to it. An appropriate I/O strategy for this system might be interrupt-driven I/O. When comparing polled and interrupt driven I/O, polled I/O results in...


(A) faster response time. (B) more CPU time wasted. (C) less CPU time wasted. (D) A and B. (E) A and C.





3. A pre-emptive system has a fixed time quantum. Having more READY processes will result in a ............... rate of CPU speed for each process.


(A) lower (B) higher (C) lower effective (D) higher effective (E) No changes at all





4. Is it possible to run two user processes in a single OS and have the (machine language) instructions happening at EXACTLY the same time?


(A) YES. (B) NO.

Quick OS question?
Jesus only knows what is going on here and i have had 2 years of computer tech training and i have my A+ certification papers and still have no idea