Operating systems concept MCQ Test 16

By | October 3, 2017

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

Question 1
Thrashing
A
is a natural consequences of virtual memory system
B
can always be avoided by swapping
C
always occurs on large computers
D
can be caused by poor paging algorithms
Question 2
For I/O bound jobs, in a uniprogramming process CPU can be in idle state for
A
10-20% of time
B
30-40% of time
C
60-70% of time
D
80-90% of time
Question 3
A scheduling algorithm assigns priority proportional to the waiting time of a process. Every process starts with priority zero (the lowest priority). The scheduler re-evaluates the process priorities every T time units and decides the next process to schedule. Which one of the following is TRUE if the processes have no I/O operations and all arrive at time zero?
A
This algorithm is equivalent to the first-come-first-serve algorithm
B
This algorithm is equivalent to the round-robin algorithm
C
This algorithm is equivalent to the shortest-job-first algorithm
D
This algorithm is equivalent to the shortest-remaining-time-first algorithm
Question 4
Process in which a program is written to respond to the button clicks, menu selections, and other actions of user in whatever order is termed as
A
event-driven programming
B
action-driven programming
C
user-driven programming
D
mouse-driven programming
Question 5
The kernel of the operating system remains in the primary memory because.....
A
It is mostly called (used)
B
It manages all interrupt calls
C
It controls all operations in process
D
It is low level
Question 6
In distributed file system, file name does not reveal the file's
A
local name
B
physical storage location
C
both local name and physical storage location
D
none of the mentioned
Question 7
Which one of the following is not a valid state of a thread?
A
running
B
destroying
C
ready
D
blocked
Question 8
Segment pointers divided memory into
A
Register
B
Process
C
Segments
D
Scaling
Question 9
The address loaded into the memory address register of the memory is referred to as:
A
Physical address
B
Logical address
C
Neither physical nor logical
D
None of the mentioned
Question 10
Beowulf clusters of the computer system uses
A
close source softwares
B
open source softwares
C
dedicated softwares
D
both A and B
Question 11
Which class network is used for a collection of a small number of networks with a large number of nodes?
A
Class A
B
Class B
C
Class C
D
All of the above
Question 12
In the non blocking send:
A
the sending process keeps sending until the message is received
B
the sending process sends the message and resumes operation
C
the sending process keeps sending until it receives a message
D
None of these
Question 13
What are the different ways file accesses take place?
A
sequential access
B
direct access
C
indexed sequential access
D
all of the mentioned
Question 14
Entering point of the windows is
A
START button
B
log in screen
C
CPU
D
desktop
Question 15
In a real time system the computer results:
A
must be produced withing a specific deadline period
B
may be produced at any time
C
may be correct
D
all of the mentioned
Question 16
The.......... policy segments the disks request queue into sub queues of the length N.
A
SCAN
B
C-SCAN
C
N-Step SCAN
D
FSCAN
There are 16 questions to complete.

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