Operating Systems - Old Questions

5.  Suppose that a disk drive has the cylinder numbered, 0 to 199 is currently serving a request at cylinder 143. The queue it request is kept in the FIFO order 25, 17, 119, 197, 194, 15, 182, 115, 183. What is the total head movement needed to satisfy these request for the following disk scheduling algorithm.

    a) FCFS

    b) SSTF