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The following question based on operating system topic of computer mcq
(a) Recently received request is entertained at the last.
(b) Recently received request is entertained first.
(c) Requests are selected at random
(d) None of these.
The correct answers to the above question in:
Answer: (b)
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Question : 1
In uni-processor scheduling, if nonpreemptive policy is applied then
a) Once a process is in running state, it continues to execute until it terminates or block itself.
b) Currently running process can be interrupted and moved to ready state by the operating system.
c) The clock interrupt is generated at periodic intervals.
d) None of these.
Answer »Answer: (a)
Question : 2
In RAID (Redundant Array of Independent Disks) scheme, which of the following RAID level does not include redundancy to improve performance ?
a) RAID level 0
b) RAID level 1
c) RAID level 2
d) RAID level 4
Answer »Answer: (a)
Question : 3
IR (Instruction register)
a) Contains the address of an instruction to be fetched.
b) Contains the instruction most recently fetched
c) Specifies memory addresses.
d) None of these.
Answer »Answer: (b)
Question : 4
In disk scheduling, SCAN algorithm states
a) The arm is required to move in one direction only.
b) The arm can be moved in any direction.
c) The arm is fixed.
d) None of these.
Answer »Answer: (a)
Question : 5
he compaction is the technique in memory management that is used to over come
a) Internal fragmentation
b) External fragmentation
c) Both (A) and (B)
d) None of these.
Answer »Answer: (b)
Question : 6
Disaster recovery
a) is needed by every installation
b) is never needed
c) varies in degree between installations
d) requires off-site computer for immediate use
Answer »Answer: (c)
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