操作系统选择题·八

1. The heads of the magnetic disk are attached to a _____ that moves all the heads as a unit.

   a) spindle

   b) disk arm

   c) track

   d) none of the mentioned

   
   

2. The set of tracks that are at one arm position make up a ___________

   a) magnetic disks

   b) electrical disks

   c) assemblies

   d) cylinders

   
   

3. The time taken to move the disk arm to the desired cylinder is called the ____________

   a) positioning time

   b) random access time

   c) seek time

   d) rotational latency

   
   

4. When the head damages the magnetic surface, it is known as _________

   a) disk crash

   b) head crash

   c) magnetic damage

   d) all of the mentioned

   
   

5. What is the host controller?

   a) controller built at the end of each disk

   b) co