Operating systems concept MCQ Test 33

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

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Question 1
Feed back queue
A
dispatch tasks according to execution characteristics
B
are used to favor real-time tasks
C
require manual intervention to implement properly
D
None of the above
Question 2
Multiprogramming
A
consists of those addresses that may be generated by a processor during execution of a computation.
B
is a method of allocating processor time.
C
allows multiple programs to reside in separate areas of core at the time.
D
None of the above
Question 3
A dedicated device is :
  1. opposite to a sharable device
  2. same as a sharable device
  3. can be used concurrently by several processes
  4. cannot be used concurrently by several processes
A
I and III
B
II and III
C
II, III and IV
D
I and IV
Question 4
Multithreading on a multi CPU machine :
A
decreases concurrency
B
increases concurrency
C
doesnt affect the concurrency
D
can increase or decrease the concurrency
Question 5
The LRU algorithm
A
pages out pages that have not been used recently
B
pages out pages that have been least used recently
C
pages out the first page in a given area
D
None of the above
Question 6
The overall I/O rate in RAID level 4 is :
A
low
B
very low
C
high
D
none of the above
Question 7
Orders are processed in the sequence they arrive if ....... rule sequences the jobs.
A
earliest due date
B
slack time remaining
C
first come, first served
D
critical ratio
Question 8
Which of the following addressing modes, facilitates access to an operand whose location is defined relative to the beginning of the data structure in which it appears?
A
sorting
B
index
C
indirect
D
None of the above
Question 9
What are parts of network structure ?
  1. Workstation
  2. Gateway
  3. Laptop
  4. Mouse
A
I and III
B
II and III
C
II, III and IV
D
I,II and III
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