Operating System Mcqs

Page No. 87

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


amagnetic disks


belectrical disks


cassemblies


dcylinders


View Answer cylinders

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


aspindle


bdisk arm


ctrack


dnone of the mentioned


View Answer disk arm

In _______ information is recorded magnetically on platters.


amagnetic disks


belectrical disks


cassemblies


dcylinders


View Answer magnetic disks

In the ______ algorithm, the disk arm goes as far as the final request in each direction, then reverses direction immediately without going to the end of the disk.


aLOOK


bSCAN


cC-SCAN


dC-LOOK


View Answer LOOK

In the _______ algorithm, the disk head moves from one end to the other, servicing requests along the way. When the head reaches the other end, it immediately returns to the beginning of the disk without servicing any requests on the return trip.


aLOOK


bSCAN


cC-SCAN


dC-LOOK


View Answer C-SCAN

In the ______ algorithm, the disk arm starts at one end of the disk and moves toward the other end, servicing requests till the other end of the disk. At the other end, the direction is reversed and servicing continues.


aLOOK


bSCAN


cC-SCAN


dC-LOOK


View Answer SCAN

SSTF algorithm, like SJF __________ of some requests.


amay cause starvation


bwill cause starvation


cdoes not cause starvation


dcauses aging


View Answer may cause starvation

On media that use constant linear velocity (CLV), the _____________ is uniform.


adensity of bits on the disk


bdensity of bits per sector


cthe density of bits per track


dthe density of bits per track



Magnetic tape drives can write data at a speed ________ disk drives.


amuch lesser than


bcomparable to


cmuch faster than


dnone of the mentioned


View Answer comparable to

Random access in magnetic tapes is _________ compared to magnetic disks.


afast


bvery fast


cslow


dvery slow


View Answer very slow

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