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Home
Questions & Answer
Technology Questions & Answers
Operating System Questions & Answers
Operating System Questions & Answers
(Compiled from UPSC, SSC ,PSC ,IBPS previous question papers)
Which of the following does not interrupt an running process
A
A device
B
Timer
C
Schedular Process
D
Power failure
Which process is known for initializing a microcomputer with its OS
A
cold booting
B
boot recording
C
booting
D
warm booting
Which operating system use write through catches
A
UNIX
B
XENIX
C
ULTRIX
D
DOS
Creating a job queue is a function of
A
Spooler
B
Interperator
C
Complier
D
Drive
A high paging rate
A
may cause a high I/O rate
B
keeps the system running well
C
is a symptom of too much processor activity
D
always creates a slow system
A public key encryption system
A
Allows only the correct sender to decode the data
B
Allows only the correct receiver to decode the data
C
Allows anyone to decode the data
D
none of above
Fragmentation of a file system
A
occurs only is file is not used properly
B
can always be prevented
C
happens in all file systems
D
can be removed by compaction
Semaphores function is to
A
synchronize critical resources to prevent deadlock
B
synchronize processes for better CPU utilization
C
used for memory management
D
none of above
Operating system is
A
A collection of hardware components
B
A collection of input output devices
C
A collection of software routines
D
All of above
Shortest Job First executes first the job
A
with the least processor needs
B
that first entered the queue
C
that has been in the queue for the longest
D
that last entered the queue
The LRU algorithm
A
pages out pages that have been used recently
B
pages out pages that have not been used recently
C
pages out pages that have been least used recently
D
pages out the first page in a given area
A thread is
A
lightweight process where the context switching is low
B
lightweight process where the context swithching is high
C
used to speed up paging
D
used in dead locks
Multiprogramming systems
A
Are easier to develop than single programming systems
B
Execute each job faster
C
Execute more jobs in the same time
D
Are used only on large main frame computers
The part of machine level instruction, which tells the central processor what has to be done, is
A
Operation code
B
Address
C
Locator
D
Flip-Flop
Dispatcher function is to
A
put tasks in I/O wait
B
schedule tasks in processor
C
change task priorities
D
All of above
Which technique is used by operating systems to execute several programs concurrently by switching back and forth
A
Partitioning
B
Multitasking
C
Windowing
D
Paging
E
Answer And E
Problem of thrashing is affected significantly by
A
program structure
B
program size
C
primary storage size
D
all of above
Macintosh computer uses
A
System 7.0
B
AU/X
C
Xenix
D
none of above
Which operating system reacts in the actual time
A
Batch system
B
Quick response system
C
Real time system
D
Time sharing system
Reference bit is used for
A
Implementing LRU page replacement algorithm
B
Implementing NRU algorithm
C
To check the page table entry in the cache memory
D
none of above
Which is single user operating system
A
MS-DOS
B
UNIX
C
XENIX
D
LINUX
In which scheduling policies, context switching never takes place
A
FCFS
B
round robin
C
Shortest job first
D
Pre-empitive
For multiprogramming operating system
A
special support from processor is essential
B
special support from processor is not essential
C
cache memory is essential
D
none of above
Semophores are used to solve the problem of
A
race condition
B
process synchronization
C
mutual exclusion
D
belady problem
Size of virtual memory depends on
A
size of data bus
B
size of address bus
C
size of main memory
D
none of above
In real time OS, which is most suitable scheduling scheme
A
round robin
B
FCFS
C
pre-emptive scheduling
D
random scheduling
Dirty bit is used to show
A
Page with corrupted data
B
Wrong page in memory
C
Page that is modified after being loaded in the cache memory
D
page that is less frequently accessed
Which among following scheduling algorithms give minimum average waiting time
A
FCFS
B
SJF
C
Round robin
D
On priority
Memory protection is normally done by
A
the processor and the associated hardware
B
the operating system
C
the compiler
D
the user program
Which scheduling policy is best suited for time-sharing operating systems
A
Shortest job first
B
Round robin
C
First come first serve
D
Elevator
1
2
3
4
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