Operating systems concept MCQ Test 46

By | October 3, 2017

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

Question 1 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
Let the time taken to switch between user mode and kernel mode of execution be T1 while time taken to switch between two user processes be T2. Which of the following is correct?
A
T1 < T2
B
T1 > T2
C
T1 = T2
D
Nothing can be said about the relation between T1 and T2.
Question 2 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
A state is safe if the system can allocate resources to each process (up to its maximum) in some order and still avoid deadlock. Then
A
deadlocked state is unsafe
B
unsafe state may lead to a deadlock situation
C
deadlocked state is a subset of unsafe state
D
all of these
Question 3 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
Jobs are allocated CPU space for its execution by algorithm of
A
CPU bound algorithm
B
CPU assistance algorithm
C
CPU tasker algorithm
D
CPU scheduler algorithm
Question 4 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
File storage system is one of computer system's
A
hardware
B
operating system
C
resources
D
compilers
Question 5 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
The..... is used by device controllers to request service.
A
nonmaskable interrupt
B
blocked interrupt
C
maskable interrupt
D
none of the mentioned
Question 6 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
To avoid deadlock
A
there must be a fixed number of resources to allocate
B
resource allocation must be done only once
C
all deadlocked processes must be aborted
D
inversion technique can be used
Question 7 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
What command is used with file named 'letter' to remove the executable permission from the user and assign read permission to the group and others?
A
chmod go +, X u-x letter
B
chmod g-, X uo + r letter
C
chmod go + r, u + x letter
D
chmod u-, X go + r letter
Question 8 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
The solution to starvation is:
A
the number of rollbacks must be included in the cost factor
B
the number of resources must be included in resource preemption
C
resource preemption be done instead
D
all of the mentioned
Question 9 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
What are examples of state information?
A
opened files and their clients
B
file descriptors and file handles
C
current file position pointers
D
all of the mentioned
Question 10 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
In distributed systems, a logical clock is associated with
A
each instruction
B
each process
C
each register
D
none of the mentioned
Question 11 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
Caching:
A
holds a copy of the data
B
is fast memory
C
holds the only copy of the data
D
holds output for a device
Question 12 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
In which of the following page replacement policies Belady's anomaly occurs?
A
Most recently used.
B
LRU
C
FIFO
D
Optimal page replacement policy.
Question 13 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
Operating system is also known as
A
database
B
system software
C
hardware
D
printer
Question 14 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
A Microsoft Windows is a(n)
A
Operating system
B
Graphic program
C
Word Processing
D
Database program
Question 15 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
A mount operation includes the:
A
name of the network
B
name of the remote directory to be mounted
C
name of the server machine storing it
D
all of the mentioned
Question 16 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
The two kinds of semaphores are:
A
mutex & counting
B
binary & counting
C
counting & decimal
D
decimal & binary
There are 16 questions to complete.

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