Operating%20system/Secondary%20memory%20and%20Disk%20scheduling Sample Test,Sample questions

Question:
Consider a circular disk where tracks are numbered from 0 to 100, if we have a following request vector
4,34,10,19,73,89,17
If currently header at 22 and moving up,find the total head moment in order to satisfy this request using FCFS.

1.265

2.233

3.224

4.223


Question:
Consider a circular disk where tracks are numbered from 0 to 100, if we have a following request vector 
4,34,10,19,73,89,17 
If currently header at 22 and moving up,find the total head moment in order to satisfy this request using C-Scan.

1.123

2.197

3.178

4.None of the above


Question:
Consider a circular disk where tracks are numbered from 0 to 100, if we have a following request vector 
4,34,10,19,73,89,17 
If currently header at 22 and moving up,find the total head moment in order to satisfy this request using LOOK.

1.152

2.167

3.197

4.180


Question:
Consider a circular disk where tracks are numbered from 0 to 100, if we have a following request vector 
4,34,10,19,73,89,17 
If currently header at 22 and moving up,find the total head moment in order to satisfy this request using Scan.

1.103

2.174

3.187

4.190


Question:
Consider a circular disk where tracks are numbered from 0 to 100, if we have a following request vector 
4,34,10,19,73,89,17 
If currently header at 22 and moving up,find the total head moment in order to satisfy this request using SSTF.

1.103

2.174

3.123

4.223


Question:
Consider a disk where each sector contain 256 bytes, each track contains 512 sectors and disk contain 64 tracks, what is the capacity of disk ?

1.256 KB

2.128 KB

3.8 MB

4.1 MB


Question:
Consider a disk where each sector contain 64 bytes, each track contains 128 sectors and disk contain 1000 tracks, what is the capacity of disk ?

1.8MB

2.16MB

3.32MB

4.None of the above


Question:
In double inter-leaving , the transfer time is become

1.3 times

2.2 times

3.2.75 time

4.remain constant


Question:
In single inter-leaving, the transfer time is

1.double

2.triple

3.constant

4.varies according to header


Question:
Time taken by read/write header to reach the correct track is - 

1.Rotational latency

2.Seek time

3.Transfer time

4.None of the above


More MCQS

  1. paging
  2. Page replacement policy
  3. Secondary memory and Disk scheduling
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