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The following question based on operating system topic of computer mcq
(a) Thread switching does not requires kernel mode privileges because all of the thread management are within the user address space of a single process.
(b) Here scheduling can be application specific.
(c) ULT can be run an any operating system.
(d) When ULT executes a system call, not only that thread blocked, but all of the threads within the process are blocked.
The correct answers to the above question in:
Answer: (d)
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Read more operating system Based Computer Questions and Answers
Question : 1
The operations of the processor are supervised by
a) Control and Status register
b) Data register.
c) Address register.
d) None of these.
Answer »Answer: (a)
Question : 2
Following is not the stream oriented I/O device
a) Printer
b) Mouse
c) Communication modules
d) Disk/tape
Answer »Answer: (d)
Question : 3
Process control block is also referred as
a) Fast control block
b) Process descriptor
c) Task descriptor
d) A, B, C are all true.
Answer »Answer: (d)
Question : 4
Virtual memory is
a) simple to implement
b) used on all major commercial operating systems
c) less efficient in utilization of memory
d) useful when fast I/O devices are not available
Answer »Answer: (c)
Question : 5
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 : 6
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)
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operating system set 1
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