Operating systems concept MCQ Test 7

By | October 3, 2017
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UGC-NET/GATE Multiple Choice Questions for Operating System.

Question 1
A non blocking system call ..................
A
halts the execution of the application for an extended time
B
does not halt the execution of the application
C
does not block the interrupts
D
none of the above
Question 2
A scheduling algorithm can use either ........... priority or ........ priority.
A
static, still
B
static, dynamic
C
live, dead
D
none of the above
Question 3
What are two features of a tripwire file system ?
  1. It is a tool to monitor file systems
  2. It is used to alert system administrator to these modification
  3. It is used to automatically take corrective action
  4. It is used to secure UNIX system
A
I and III
B
II and III
C
II, III and IV
D
I and II
Question 4
By preallocating the inodes and spreading them across the volume, we ........... the system performance.
A
improve
B
decrease
C
maintain
D
do not affect
Question 5
Which of the following is TRUE ?
A
Overlays are used to increase the size of physical memory
B
Overlays are used to increase the logical address space
C
When overlays are used, the size of a process is not limited to the size of the physical memory
D
Overlays are used whenever the physical address space is smaller than the logical address space
Question 6
Job Control Language (JCL) statements are used to
A
Specify, to the operating system, the beginning and end of a job in a batch
B
Allocate the CPU to a job
C
All of the above
D
None of the above
Question 7
When the page fault rate is low :
A
the turnaround time increases
B
the effective access time increases
C
the effective access time decreases
D
A and B
Question 8
There are 10 different processes running on a workstation. Idle processes are waiting for an input event in the input queue. Busy processes are scheduled with the Round-Robin timesharing method. Which out of the following quantum times is the best value for small response times, if the processes have a short runtime, e.g. less than 10ms ?
A
tQ = 15ms
B
tQ = 40ms
C
tQ = 45ms
D
tQ = 50ms
Question 9
The security of a system can be improved by
A
threat monitoring
B
audit log
C
both (A) and (B)
D
none of these
Please report wrong answer in comment box
There are 9 questions to complete.

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