Operating systems concept MCQ Test 29

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

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Question 1
Which system call returns the process identifier of a terminated child?
A
wait
B
exit
C
fork
D
get
Question 2
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 above
Question 3
Data encryption
A
is mostly used by financial networks
B
cannot be used by private installations
C
is not necessary, since data cannot be intercepted
D
None of the above
Question 4
The two ways of aborting processes and eliminating deadlocks are :
  1. Abort all deadlocked processes
  2. Abort all processes
  3. Abort one process at a time until the deadlock cycle is eliminated
  4. All of these
A
I and IV
B
II and III
C
II, III and IV
D
I and IIII
Question 5
In paged memory systems, if the page size is increased, then the internal fragmentation generally :
A
becomes less
B
becomes more
C
remains constant
D
none of the above
Question 6
If working set window is too large :
A
it will not encompass entire locality
B
it may overlap several localities
C
it will cause memory problems
D
none of the above
Question 7
The information about all files is kept in :
A
swap space
B
operating system
C
seperate directory structure
D
none of the above
Question 8
What are characteristics of anomaly based IDS ?
  1. It models the normal usage of network as a noise characterization
  2. It doesnt detect novel attacks
  3. Anything distinct from the noise is assumed to be intrusion activity
  4. It detects based on signature.
A
I and II
B
II and III
C
II, III and IV
D
I and III
Question 9
The valid invalid bit, in this case, when valid indicates :
  1. the page is legal
  2. the page is illegal
  3. the page is in memory
  4. the page is not in memory
A
I and II
B
II and III
C
II, III and IV
D
I and III
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