Operating systems concept MCQ Test 29

By | October 3, 2017

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

Question 1
Condition codes are bits typically set by the
A
Processor execution
B
processor operation
C
Processor hardware
D
Processor software
Question 2
With..... a requested page and several subsequent pages are read and cached.
A
write ahead
B
read ahead
C
free-behind
D
add-front
Question 3
Which of the following is characteristic of an operating system?
A
resource management
B
error recovery
C
memory management
D
All the above
Question 4
MD5 produces..... bits hash data.
A
128
B
150
C
160
D
112
Question 5
In a paged memory, the page hit ratio is 0.35. The required to access a page in secondary memory is equal to 100 ns. The time required to access a page in primary memory is 10 ns. The average time required to access a page is:
A
3.0 ns
B
68.0 ns
C
68.5 ns
D
78.5 ns
Question 6
Most widely used graphical user interface operating system for personal computers is
A
Microsoft windows
B
Mac windows
C
Android windows
D
UNIX
Question 7
The process to be aborted is chosen on the basis of the following factors:
A
priority of the process
B
process is interactive or batch
C
how long the process has computed
D
all of the mentioned
Question 8
Random access in magnetic tapes is.......... compared to magnetic disks.
A
fast
B
very fast
C
slow
D
very slow
Question 9
Operating system is
A
A collection of hardware components
B
A collection of input output devices
C
A collection of software routines
D
All of above
Question 10
How many class A, B and C network IDs can exist?
A
128
B
126
C
16, 382
D
2, 113, 658
Question 11
Suppose the time to service a page fault is on the average 10 milliseconds, while a memory access takes 1 microsecond. Then a 99.99% hit ratio results in average memory access time of
A
1.9999 milliseconds
B
1 millisecond
C
9.999 microseconds
D
1.9999 microseconds
Question 12
Which java feature is used to invoke a method on a remote object?
A
Process Control Block (PCB)
B
Remote Method Invocation (RMI)
C
Remote acess control Block
D
both A and B
Question 13
System call routines of the operating system are mostly written in
A
C
B
C++
C
java
D
both A and B
Question 14
GNOME is based on
A
CORBA toolkit
B
COM/DCOM toolkit
C
ORE toolkit
D
OLE DB toolkit
Question 15
Which internal DOS command clears the screen and places the DOS prompt in the upper left corner of the screen?
A
cls
B
close
C
quit
D
exit
Question 16
A locking protocol is one that:
A
governs how locks are acquired
B
governs how locks are released
C
governs how locks are acquired and released
D
none of the mentioned
There are 16 questions to complete.

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