Operating systems concept MCQ Test 37

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

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Question 1
In which addressing mode, the effective address of the operand is generated by adding a constant value to the contents of register?
A
indirect mode
B
immediate mode
C
index mode
D
None of the above
Question 2
A mount operation includes the :
  1. name of the network
  2. name of the remote directory to be mounted
  3. name of the server machine storing it
  4. All of these
A
I and III
B
II and IV
C
II, III and IV
D
II and III
Question 3
The Banker s algorithm is ............. than the resource allocation graph algorithm.
A
less efficient
B
more efficient
C
none of the above
Question 4
What are the three copy rights ?
  1. Copy
  2. transfer
  3. limited copy
  4. owner
b,c
A
I and III
B
II and III
C
II, III and IV
D
I,II and III
Question 5
What are the characteristics of tightly coupled system ?
  1. Same clock, usually shared memory
  2. Communication is via this shared memory
  3. Multiprocessors
  4. Different clock
A
I and III
B
II and III
C
II, III and IV
D
I,II and III
Question 6
Worm
A
is a process that uses the spawn mechanism to clobber system performance
B
spawns copies of itself, using up system resources and perhaps locking out system use by all other processes.
C
both (A) and (B)
D
none of these
Question 7
How does an antivirus of today identify viruses ?
  1. Previously known patterns
  2. It can detect unknown patterns
  3. It can take high priority to increase scanning speed
  4. It looks at behavior of a running program
A
I and III
B
II and III
C
II, III and IV
D
I and IV
Question 8
For large files, when the index itself becomes too large to be kept in memory :
A
index is called
B
an index is created for the index file
C
secondary index files are created
D
all of the above
Question 9
The Operating system manages
A
Processor
B
Disks and I/O devices
C
All of the above
D
None of the above
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