Secondary Storage


Question 1
A magnetic disk has 100 cylinders, each with 10 tracks of 10 sectors. If each sector contains 128 bytes, what is the maximum capacity of the disk in kilobytes?
A
12,80,000
B
1280
C
1250
D
1,28,000
ISRO CSE 2020   Computer Organization
Question 2
A particular disk unit uses a bit string to record the occupancy or vacancy of its tracks, with 0 denoting vacant and 1 for occupied. A 32-bit segment of this string has hexadecimal value D4FE2003. The percentage of occupied tracks for the corresponding part of the disk, to the nearest percentage is:
A
12
B
25
C
38
D
44
ISRO CSE 2018   Computer Organization


Question 3
SATA is the abbreviation of
A
Serial Advanced Technology Attachment
B
Serial Advanced Technology Architecture
C
Serial Advanced Technology Adapter
D
Serial Advanced Technology Array
ISRO CSE 2017   Computer Organization
Question 4
Consider a disk pack with 16 surfaces, 128 tracks per surface and 256 sectors per track. 512 bytes of data are stored in a bit serial manner in a sector. The capacity of the disk pack and the number of bits required to specify a particular sector in the disk are respectively:
A
256 Mbyte, 19 bits
B
256 Mbyte, 28 bits
C
512 Mbyte, 20 bits
D
64 Gbyte, 28 bits
ISRO CSE 2016   Computer Organization
Question 5
A hard disk system has the following parameters :
Number of tracks =500
Number of sectors/track =100
Number of bytes /sector =500
Time taken by the head to move from one track to adjacent track =1 ms
Rotation speed =600 rpm.
What is the average time taken for transferring 250 bytes from the disk ?
A
300.5 ms
B
255.5 ms
C
255 ms
D
300 ms
ISRO CSE 2015   Computer Organization


There are 5 questions to complete.

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