Operating systems concept MCQ Test 8

By | October 3, 2017

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

Question 1
What is role of base/bound registers?
A
They give starting address to a program
B
Program's addresses are neatly confined to space between the base and the bound registers
C
They provide encrypted environment
D
This technique doesn't protects a program's address from modification by another user
Question 2
..... is the time required by a sector to reach below read/write head.
A
Seek Time
B
Latency Time
C
Access time
D
None of the above
Question 3
Commonly used secondary memory is
A
CD
B
DVD
C
floppy
D
magnetic disk
Question 4
Which option will be used with ps command to slow the entire command line of the process being run?
A
-4
B
-f
C
-1
D
-2
Question 5
Consider the following C code for process P1 and P2. a=4, b=0, c=0 (initialization) P1 P2 if (a < 0) b = 10; c = b-a; a =-3; else c = b+a; If the processes P1 and P2 executes concurrently (shared variables a, b and c), which of the following cannot be the value of 'c' after both processes complete?
A
4
B
7
C
10
D
13
Question 6
A bit that selects the mode of the operating system is called
A
kernel bit
B
user bit
C
mode bit
D
system bit
Question 7
Division by zero error are caused by
A
user defined code
B
OS code
C
process
D
interrupt
Question 8
Which of the following is not a characteristic of a daisy chaining priority control scheme?
A
priority is programmable
B
it is relatively easy to add more devices to the chain
C
the failure of one device may affect other devices on the chain
D
the number of control lines is independent of the number of devices on the chain
Question 9
You are installing Windows 2000 Server on a multiprocessor computer. The manufacturer has provided a customized HAL to use with the computer. The HAL is on the floppy disk. You want to install the customized HAL design for the computer. What should you do?
A
During the text mode portion of the Windows 2000 setup install the customized HAL
B
After text mode portion of Windows 2000 setup is complete use the recovery console to copy the customized HAL to the system32 folder on the boot partition
C
After the text mode portion your windows 2000 setup is complete use the emergency repair process to replace the existing HAL with the customized HAL and then continue the windows 2000 setup
D
After the Windows 2000 setup is complete use the device manager to scan for Hardware changes when prompted install the customized HAL
Question 10
Normally user programs are prevented from handling I/O directly by I/O instructions in them. For CPUs having explicit I/O instructions, such I/O protection is ensured by having the I/O instructions privileged. In a CPU with memory mapped I/O, there is no explicit I/O instruction. Which one of the following is true for a CPU with memory mapped I/O?
A
I/O protection is ensured by operating system routine(s)
B
I/O protection is ensured by a hardware trap
C
I/O protection is ensured during system configuration
D
I/O protection is not possible
Question 11
The squared coefficient of variance, traditionally called
A
$C^2$
B
$C^3$
C
$S^2$
D
$S^3$
Question 12
A partitioned data set is most used for
A
a program or source library
B
storing program data
C
storing backup information
D
storing ISAM files
Question 13
CineBlitz multimedia server supports
A
real time clients
B
non-real time clients
C
both real time & non-real time clients
D
none of the mentioned
Question 14
Which of the following could be a valid DOS file specification?
A
NOSFILE.POST
B
NOSFILE.P.OST
C
NOSFILE.DOC
D
NOST.FILEDOC
Question 15
HANDLE file in operating system domain is file to
A
create
B
read
C
delete
D
store
Question 16
Part of a program where the shared memory is accessed and which should be executed invisibly, is called
A
semaphores
B
directory
C
critical section
D
mutual exclusion
There are 16 questions to complete.

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