which disk should be accessed next

the order in which disk access requests must be serviced

the physical location where files should be accessed in the disk

none of these

Process or busy

High I/O rate

High paging rates

All of these

2.5 s

2.9 s

3.1 s

3.6 s

2.5 Mbits/s

4.25 Mbits/s

1.5Mbits/s

3.75Mbits/s

3

5

4

none of these