1
GATE CSE 2014 Set 1
Numerical
+1
-0
Suppose a disk has 201 cylinders, numbered from 0 to 200. At some time the disk arm is at cylinder 100, and there is a queue of disk access requests for cylinders 30, 85, 90, 100, 105, 110, 135 and 145. If Shortest-Seek Time First (SSTF) is being used for scheduling the disk access, the request for cylinder 90 is serviced after servicing ____________ number of requests.
Your input ____
2
GATE CSE 2008
MCQ (Single Correct Answer)
+1
-0.3
The data blocks of a very large file in the Unix file system are allocated using
A
contiguous allocation
B
linked allocation
C
indexed allocation
D
an extension of indexed allocation.
3
GATE CSE 2007
MCQ (Single Correct Answer)
+1
-0.3
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 Mbytes, 19 bits
B
256 Mbytes, 28 bits
C
512 Mbytes, 20 bits
D
64 Gbyte, 28 bits
4
GATE CSE 2005
MCQ (Single Correct Answer)
+1
-0.3
Normally user programs are prevented from handling $${\rm I}/O$$ directly by $${\rm I}/O$$ instructions in the for $$CPU$$ having explicit $${\rm I}/O$$ instructions, such $${\rm I}/O$$ protection is ensured by having the $${\rm I}/O$$ instructions privilege in $$CPU$$ with memory mapped $${\rm I}/O$$ there is no explicit $${\rm I}/O$$ instruction. Which one of the following is true for a $$CPU$$ with memory mapped $${\rm I}/O$$?
A
$${\rm I}/O$$ protection ensured by operating system routines(s)
B
$${\rm I}/O$$ protection is ensured by a hardware trap
C
$${\rm I}/O$$ protection is ensured during system configuration
D
$${\rm I}/O$$ protection is not possible.
GATE CSE Subjects
Software Engineering
Web Technologies
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