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

   
   答案：B

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

   a) magnetic disks

   b) electrical disks

   c) assemblies

   d) cylinders

   
   答案：D

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

   
   答案：C

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

   
   答案：B

5. What is the host controller?