Operating systems concept MCQ Test 39

By | October 3, 2017

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

Question 1
The field separator in cut command is specified with
A
-a option
B
-d option
C
-r option
D
-x option
Question 2
Consider the following page reference string: 1 2 3 4 2 1 5 6 2 1 2 3 7 6 3 2 1 2 3 6 For LRU page replacement algorithm with 4 frames, the number of page faults is:
A
10
B
14
C
8
D
11
Question 3
Write ahead logging is a way:
A
to ensure atomicity
B
to keep data consistent
C
that records data on stable storage
D
all of the mentioned
Question 4
The dining philosophers problem can be seen as representative of
A
Users
B
Problems
C
Process
D
Application
Question 5
Which of the following scheduling objectives should be applied to the following: the system should admit jobs to create a mix that will keep most devices busy
A
to be fair
B
to balance resource utilization
C
to obey priorities
D
to be predictable
Question 6
With regard to DOS attack what is not true from below options?
A
We can stop DOS attack completely
B
By upgrading OS vulnerability we can stop DOS attack to some extent
C
DOS attack has to be stopped at network level
D
Such attack can last for hours
Question 7
KornShell of the operating system program is used by the
A
windows
B
UNIX
C
Linux
D
both b and c
Question 8
The average arrival rate of new tasks, and the average time to perform a task is:
A
Mean number of tasks in system = Arrival rate / Mean response time
B
Mean number of tasks in system = Arrival rate + Mean response time
C
Mean number of tasks in system = Arrival rate-Mean response time
D
Mean number of tasks in system = Arrival rate
Question 9
Device drivers are implemented to interface
A
character devices
B
block devices
C
network devices
D
all of the mentioned
Question 10
Compression ratio is the ratio of:
A
the original file size to the size of the compressed file
B
the number of pixels in a frame of the original size to those in a frame of the compressed file
C
compressed file size to the original file size
D
none of the mentioned
Question 11
The different types of tables maintained by the operating system are..........
A
memory, logical, I/O file
B
memory, I/O, file, physical
C
memory, I/O, file, process
D
memory, logical, I/O, physical
Question 12
For multiprogramming, large main memory is required to accommodate
A
User programs
B
Operating system
C
Resource sharing
D
Both A and B
Question 13
A page fault occurs
A
when the page is not in the memory
B
when the page is in the memory
C
when the process enters the blocked state
D
when the process is in the ready state
Question 14
I/O throughput is sometimes called I/O bandwidth and response time is sometimes called
A
Delay
B
Mistake
C
Failure
D
Latency
Question 15
Generally, the date is entered in the form
A
DD-YY-MM
B
YY-DD-MM
C
MM-YY-DD
D
MM-DD-YY
Question 16
If timestamps of two events are same, then the events are
A
concurrent
B
non-concurrent
C
monotonic
D
non-monotonic
There are 16 questions to complete.

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