1. Virtual
memory is __________.
1
An extremely large main memory
2
An extremely large secondary memory
3
An illusion of extremely large main memory
4
A type of memory used in super computers.
Ans
) 3
2. The kernel keeps track of the state of each
task by using a data structure called __
1 Process control
block
2 User control
block
3 Memory control
block
4 None of the
above
Ans ) 1
3. _________ page replacement alogorithm suffers
from Belady's anamoly.
1 LRU
2 MRU
3 FIFO
4 LIFO
Ans ) 3
4. _________
is a high speed cache used to hold recently referenced page table entries a
part of paged virtual memory
1 Translation Look
aside buffer
2 Inverse page
table
3 Segmented page
table
4 All the above
Ans
) 1
5. If you don’t know which version of MS-DOS you
are working with, which command will you use after booting your operating
system ?
1 Format command
2 FAT command
3 VER command
4 DISK command
Ans ) 3
6. _______
OS pays more attention on the meeting of the time limits.
1 Distributed
2 Network
3 Real time
4 Online
Ans ) 3
7. Paging
_________.
1 solves the
memory fragmentation problem
2 allows modular
programming
3 allows
structured programming
4 avoids deadlock
Ans ) 1
8. A thread is a __________ process .
1 Heavy Weight
2 Mutliprocess
3 Inter Thread
4 Light weight
Ans ) 4
9. _________
allocates the largest hole (free fragment) available in the memory.
1 Best Fit
2 Worst Fit
3 First Fit
4 None of the
above
Ans ) 2
10. Number
of CPU registers in a system depends on ____________.
1 Operating system
2 Computer
Architecture
3 Computer
Organization
4 None of the
above
Ans ) 2
11. Which directory implementation is used in most
Operating System?
1 Single level
directory structure
2 Two level
directory structure
3 Tree directory
structure
4 Acyclic
directory structure
Ans ) 3
12. A
page fault occurs
1 when the page is
not in the memory
2 when the page is
in the memory
3 when the process
enters the blocked state
4 when the process
is in the ready state
Ans
) 1
13. What
is the memory from 1K - 640K called ?
1 Extended Memory
2 Normal Memory
3 Low Memory
4 Conventional
Memory
Ans ) 4
14. The
process related to process control, file management, device management,
information about system and communication that is requested by any higher
level language can be performed by __________.
1 Editors
2 Compilers
3 System Call
4 Caching
Ans ) 3
15. If
the Disk head is located initially at 32, find the number of disk moves
required with FCFS if the disk queue of I/O blocks requests are
98,37,14,124,65,67.
1 310
2 324
3 315
4 321 Ans ) 4
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