Operating system set 1

By | September 18, 2018

UGC-NET/GATE Multiple Choice Questions for Operating System.

Question 1
One of the disadvantages of user level threads compared to Kernel level threads is
A
If a user level thread of a process executes a system call, all threads in that process are blocked.
B
Scheduling is application dependent.
C
Thread switching doesn't require kernel mode privileges.
D
The library procedures invoked for thread management in user level threads are local procedures.
Question 2
A multimedia file
A
is same as any other regular file
B
must be accessed at specific rate
C
stored on remote server can not be delivered to its client
D
none of the mentioned
Question 3
A process executes the following segment of code: for(i = 1; i < = n; i++) fork (); The number of new processes created is
A
n
B
((n(n + 1))/2)
C
$2^n-1$
D
$3^n-1$
Question 4
The technique, for sharing the time of a computer among several jobs, which switches jobs so rapidly such that each job appears to have the computer to itself, is called.....
A
Time Sharing
B
Time out
C
Time domain
D
Multitasking
Question 5
A series of statements explaining how the data is to be processed is called
A
instruction
B
compiler
C
program
D
interpretor
Question 6
Interconnected configuration of computers describes terminology of
A
Multithreading
B
Multiprogramming
C
Multiprocessing
D
Multischeduling
Question 7
Let the page fault service time be 10 millisecond(ms) in a computer with average memory access time being 20 nanosecond(ns). If one page fault is generated for every 106 memory accesses, what is the effective access time for memory?
A
21 ns
B
23 ns
C
30 ns
D
35 ns
Question 8
The batch file use the extension
A
.BAT
B
.DOC
C
.PRG
D
.DOS
Question 9
A monitor is characterized by:
A
a set of programmer defined operators
B
an identifier
C
the number of variables in it
D
all of the mentioned
Question 10
The initial program that is run when the computer is powered up is called:
A
boot program
B
bootloader
C
initializer
D
bootstrap program
Question 11
Sequential access method.......... on random access devices.
A
works well
B
doesnt work well
C
maybe works well and doesnt work well
D
none of the mentioned
Question 12
Which command is used to display the subdirectory structure of the currently logged drive and pause the screen display after each screenful of information?
A
TREE
B
DELTREE/F
C
DIR | MORE
D
TREE | MORE
Question 13
In the Zero capacity queue:
A
the queue has zero capacity
B
the sender blocks until the receiver receives the message
C
both A and B
D
the sender keeps sending and the messages dont wait in the queue
Question 14
An admission control scheme assigns a.......... to each type of resource.
A
processor
B
memory location
C
resource manager
D
all of the mentioned
Question 15
You can use print manage window
A
To check status of files in the print queue
B
To cancel the print job
C
To interrupt printing
D
All of the above
Question 16
When a file system is mounted over a directory that is not empty:
A
the system may not allow the mount
B
the system must allow the mount
C
the system may allow the mount and the directory's existing files will then be made obscure
D
all of the mentioned
There are 16 questions to complete.
Category: OS

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