Disk Scheduling - 1 - Operating System Questions & Answers

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

Answer: Option 'B'

disk arm

2.

In _______ information is recorded magnetically on platters.

   A.) magnetic disks
   B.) electrical disks
   C.) assemblies
   D.) cylinders

Answer: Option 'A'

magnetic disks

3.

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

Answer: Option 'B'

disk arm

4.

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

   A.) magnetic disks
   B.) electrical disks
   C.) assemblies
   D.) cylinders

Answer: Option 'D'

cylinders

5.

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

Answer: Option 'C'

seek time

6.

The time taken for the desired sector to rotate to the disk head is called :

   A.) positioning time
   B.) random access time
   C.) seek time
   D.) rotational latency

Answer: Option 'D'

rotational latency

7.

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

Answer: Option 'B'

head crash

8.

A floppy disk is designed to rotate ___________ as compared to a hard disk drive.

   A.) faster
   B.) slower
   C.) at the same speed
   D.) none of the mentioned

Answer: Option 'B'

slower

9.

The host controller is :

   A.) controller built at the end of each disk
   B.) controller at the computer end of the bus
   C.) all of the mentioned
   D.) none of the mentioned

Answer: Option 'B'

controller at the computer end of the bus

10.

______ controller sends the command placed into it, via messages to the _____ controller.

   A.) host, host
   B.) disk, disk
   C.) host, disk
   D.) disk, host

Answer: Option 'C'

host, disk

11.

The disk bandwidth is :

   A.) the total number of bytes transferred
   B.) total time between the first request for service and the completion on the last transfer
   C.) the total number of bytes transferred divided by the total time between the first request for service and the completion on the last transfer
   D.) none of the mentioned

Answer: Option 'C'

the total number of bytes transferred divided by the total time between the first request for service and the completion on the last transfer


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