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GATE CSE

File System IO and Protection

Operating Systems

Previous Years Questions

Marks 1

More
A FAT (file allocation table) based file system is being used and the total overhead of each entry in the FAT is $$4$$ b...
GATE CSE 2014 Set 2
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 q...
GATE CSE 2014 Set 1
The data blocks of a very large file in the Unix file system are allocated using
GATE CSE 2008
Consider a disk pack with 16 surfaces, 128 tracks per surface and 256 sectors per track. 512 bytes of data are stored in...
GATE CSE 2007
Normally user programs are prevented from handling $${\rm I}/O$$ directly by $${\rm I}/O$$ instructions in the for $$CPU...
GATE CSE 2005
Consider an operating system capable of loading and executing a single sequential user process at a time. The disk head ...
GATE CSE 2004
Using a larger block size in a fixed block size file system leads to
GATE CSE 2003
Which of the following requires a device driver?
GATE CSE 2001
Which of the following disk scheduling strategies is likely to give the best throughput?
GATE CSE 1999
Listed below are some operating system abstractions (in the left column) and the hardware components. Which matching pai...
GATE CSE 1999
Which of the following is true?
GATE CSE 1998
Which of the following devices should get higher priority in assigning interrupts?
GATE CSE 1998
When an interrupt occurs, an Operating System
GATE CSE 1997
The correct matching for the following pairs is (a) Disk scheduling $$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$(1) R...
GATE CSE 1997
$$I/O$$ redirection
GATE CSE 1997
The correct matching for the following pairs is $$\,\,\,\,\,$$ List - $${\rm I}$$ (a) $$DMA$$ $$\,\,$$ $${\rm I}/O$$ (b...
GATE CSE 1997

Marks 2

More
Consider the following five disk access requests of the form (request id, cylinder number) that are present in the disk ...
GATE CSE 2020
Consider a storage disk with $$4$$ platters (numbered as $$0, 1, 2$$ and $$3$$), $$200$$ cylinders (numbered as $$0, 1,$...
GATE CSE 2018
Consider a disk queue with requests for $${\rm I}/O$$ to blocks on cylinders $$47, 38, 121, 191,$$ $$87, 11, 92, 10.$$ T...
GATE CSE 2016 Set 1
Consider a main memory with five page frames and the following sequence of page references: 3, 8, 2, 3, 9, 1, 6, 3, 8, 9...
GATE CSE 2015 Set 1
Suppose the following disk request sequence (track numbers) for a disk with 100 tracks is given: 45, 20, 90, 10, 50, 60,...
GATE CSE 2015 Set 1
A system contains three programs and each requires three tape units for its operation. The Minimum number of tape units ...
GATE CSE 2014 Set 3
A file system with 300 G Byte disk uses a file descriptor with 8 direct block addresses, 1 indirect block address and 1 ...
GATE CSE 2012
An application loads $$100$$ libraries at startup. Loading each library requires exactly one disk access. The seek time ...
GATE CSE 2011
Consider a disk system with $$100$$ cylinders. The requests to access the cylinders occur in following sequence: $$4, 34...
GATE CSE 2009
For a magnetic disk with concentric circular tracks, the seek latency is not linearly proportional to the seek distance ...
GATE CSE 2008
Consider a disk drive with the following specifications: $$16$$ surfaces, $$512$$ tracks/surface, $$512$$ sectors/track,...
GATE CSE 2005
In the index allocation scheme of blocks to a file, the maximum possible size of the file depends on
GATE CSE 2002
Formatting of floppy disk refers to
GATE CSE 1998
If the disk in (a) is rotating at $$3600$$ rpm, determine the effective data transfer rate which is defined as the numbe...
GATE CSE 1995
The root directory of a disk should be placed:
GATE CSE 1993
A certain moving arm disk storage, with one head, has the following specifications. Number of track/recording Surface $...
GATE CSE 1993
State whether the following statement are TRUE or FALSE with reason. The data transfer between memory and $${\rm I}/O$$ ...
GATE CSE 1990
Disk requests come to disk driver for cylinders $$10,22,20,2,40,56$$ and $$38,$$ in that order at a time when the disk d...
GATE CSE 1989
On receiving an interrupt from an $${\rm I}/O$$ device the $$CPU$$:
GATE CSE 1987

Marks 5

More
Consider a disk with the $$100$$ tracks numbered from $$0$$ to $$99$$ rotating at $$3000$$ $$rpm.$$ The number of sector...
GATE CSE 2001
Consider a disk with following specifications: $$20$$ surface, $$1000$$ tracks/surface, $$16$$ sectors/track, data densi...
GATE CSE 2001
A file system with a one-level directory structure is implemented on a disk with disk block size of $$4$$ K bytes. The d...
GATE CSE 1996
The head of a moving head disk with $$100$$ tracks numbered $$0$$ to $$99$$ is currently serving a request at tract $$55...
GATE CSE 1995
If the overhead for formatting a disk is $$96$$ bytes for $$40000$$ bytes sector, Compute the unformatted capacity of th...
GATE CSE 1995
Assuming the current disk cylinder to be $$50$$ and the sequence for the cylinders to be $$1, 36, 49, 65, 53, 1, 2, 3, 2...
GATE CSE 1990
A certain moving arm disk-storage device has the following specifications: Number of tracks per surface $$=4004$$ Track ...
GATE CSE 1990

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