Operating System Questions & Answers (Compiled from UPSC, SSC ,PSC ,IBPS previous question papers)

What tool is used to view the hardware and software loaded on a Windows server
KB Tool
System Information
System configuration
POST
Device manager

Which of following is not a condition of Dead Lock ?
Mutual Exclusion
No Preemption
Hold and Wait
Data Transfer

A hardware device which is capable of executing a sequence of instructions, is known as
CPU
ALU
CU
Processor

Root directory of a disk should be placed
at the fixed address in the main memory
at a fixed location on the disk
at the fixed location on system disk
anywhere on the disk

Which is non pre-emptive
Round robin
FIFO
MQS
MQSF

Scissoring enables
a part of data to be displayed
entire data to be displayed
full data display on fulll area of sceen
no data display

A series of statements explaining how the data is to be processed is called
instruction
compiler
program
interpretor

Daisy chain is a device for
connecting a number of controllers to a device
connecting a number of device to a controller
all of above
none of above

Remote computing services involves the use of timesharing and
multiprocessing
interactive processing
batch processing
real time processing

Four necessary conditions for deadlock are non pre-emption, circular wait, hold and wait and
mutual exclusion
race condition
buffer overflow
None of above

Poor response times are caused by
Busy processor
High I/O rate
High paging rates
Any of above

Dynamic allocation of storage areas with VSAM files is accomplished by
hashing
control splits
over flow areas
relative recording

Which of the following does not interrupt an running process
A device
Timer
Schedular Process
Power failure

Which process is known for initializing a microcomputer with its OS
cold booting
boot recording
booting
warm booting

Which operating system use write through catches
UNIX
XENIX
ULTRIX
DOS

Creating a job queue is a function of
Spooler
Interperator
Complier
Drive

A high paging rate
may cause a high I/O rate
keeps the system running well
is a symptom of too much processor activity
always creates a slow system

A public key encryption system
Allows only the correct sender to decode the data
Allows only the correct receiver to decode the data
Allows anyone to decode the data
none of above

Fragmentation of a file system
occurs only is file is not used properly
can always be prevented
happens in all file systems
can be removed by compaction

Semaphores function is to
synchronize critical resources to prevent deadlock
synchronize processes for better CPU utilization
used for memory management
none of above

Operating system is
A collection of hardware components
A collection of input output devices
A collection of software routines
All of above

Shortest Job First executes first the job
with the least processor needs
that first entered the queue
that has been in the queue for the longest
that last entered the queue

The LRU algorithm
pages out pages that have been used recently
pages out pages that have not been used recently
pages out pages that have been least used recently
pages out the first page in a given area

A thread is
lightweight process where the context switching is low
lightweight process where the context swithching is high
used to speed up paging
used in dead locks

Multiprogramming systems
Are easier to develop than single programming systems
Execute each job faster
Execute more jobs in the same time
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
Operation code
Address
Locator
Flip-Flop

Dispatcher function is to
put tasks in I/O wait
schedule tasks in processor
change task priorities
All of above

Which technique is used by operating systems to execute several programs concurrently by switching back and forth
Partitioning
Multitasking
Windowing
Paging
Answer And E

Problem of thrashing is affected significantly by
program structure
program size
primary storage size
all of above

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Operating System Question Answers, PSC, UPSC, IBPS, SSC Previous Papers