Operating systems concept MCQ Test 12

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

Question 1
The mean time to failure of a mirrored disk depends on : I) the mean time to failure of individual disks II) the mean time to repair
A
Only I
B
Only II
C
Both I and II
D
Neither I nor II
Question 2
The .......... is used by device controllers to request service.
A
nonmaskable interrupt
B
blocked interrupt
C
maskable interrupt
D
none of the above
Question 3
Special software to create a job queue is called a
A
Spooler
B
Interpreter
C
Linkage editor
D
None of the above
Question 4
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 balance resource utilization
B
to obey priorities
C
to be predictable
D
None of the above
Question 5
The degree of multi-programming is :
A
the number of processes executed per unit time
B
the number of processes in the ready queue
C
the number of processes in the I/O queue
D
the number of processes in memory
Question 6
The state of the data accessed by an aborted transaction must be restored to what it was just before the transaction started executing. This restoration is known as ........ of transaction.
A
safety
B
protection
C
roll back
D
revert back
Question 7
When an entire committed transaction is completed, ............
A
it is stored in the memory
B
it is removed from the log file
C
it is redone
D
none of the above
Question 8
The shrinking phase is a phase in which :
A
A transaction may obtain locks, but does not release any
B
A transaction may obtain locks, and releases a few or all of them
C
A transaction may release locks, but does not obtain any new locks
D
A transaction may release locks, and does obtain new locks
Question 9
While running DOS on a PC, which command would be used to duplicate the entire diskette?
A
DISKCOPY
B
CHKDSK
C
TYPE
D
None of the above
Please report wrong answer in comment box
There are 9 questions to complete.

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