Operating System Secondary Storage Structure Questions and Answers

Question 1 : In a hard disk, what rotates about a central spindle

(a) Disk
(b) Platter
(c) Sector
(d) None of the above

Question 2 : The collection of tracks under the head at any time is known as

(a) Cylinder
(b) Sector
(c) Spindle
(d) None of the above

Question 3 : Disk address consists of

(a) (Cylinder number, track number)
(b) (Cylinder number, track number, sector number)
(c) (Cylinder number, sector number)
(d) None of the above

Question 4 : The time required to move the disk arm to the required track is known as

(a) Latency time
(b) Access time
(c) Seek time
(d) None of the above

Question 5 : Seek-time is given by the equation

(a) Ts = mn + S
(b) Ts = m + nS
(c) Ts = mn – S
(d) Ts = mn * S

Question 6 : Transfer time, T, is given by the formula

(a) T = b * rN
(b) T = b + rN
(c) T = b / rN
(d) None of the above

Question 7 : The total average time is given by

Question 8 : SSTF stands for

(a) Small Seek time first
(b) Simple Seek time first
(c) Shortest Seek time first
(d) None of the above

Question 9 : Elevator algorithm is another name for

(a) SACN
(b) SSTF
(c) SCFS
(d) None of the above

Question 10 : C-SCAN, ‘C’ stands for

(a) Common
(b) Circular
(c) Commit
(d) None of the above

Question 11 : RAID stands for

(a) Retrieval Array of Independent disks
(b) Redundant Array of Independent disks
(c) Round Allocation of Independent disks
(d) None of the above

Question 12 : The process of splitting of data into equal size partitions over multiple disks is known as

(a) Data stripping
(b) Arrays of disks
(c) RAID
(d) None of the above

Question 13 : The process of storing extra or duplicate information used for rebuilding the lost information in event of disk failure is known as

(a) Stripping
(b) Redundancy
(c) Disk Array
(d) None of the above

Question 14 : RAID supports

(a) 5 – levels
(b) 6 – levels
(c) 7 – levels
(d) None of the above

Question 15 : Mirroring refers to

(a) RAID – 1
(b) RAID – 2
(c) RAID – 3
(d) None of the above

Question 16 : ECC stands for

(a) Error Correcting codes
(b) Error Common codes
(c) Error cost codes
(d) None of the above

Question 17 : A disk with n-blocks requires a bit-map of

(a) (n+1) bits
(b) n bits
(c) (n-1) bits
(d) None of the above

Question 18 : WORM stands for

(d) None of the above

Question 19 : DVD stands for

(a) Digital very Digital
(b) Direct video Digital
(c) Digital video Disks
(d) None of the above