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The following question based on operating system topic of computer mcq
(a) operating system
(b) operating environment
(c) user interface
(d) programming platform
The correct answers to the above question in:
Answer: (c)
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Question : 1
In two level scheme for page table, if one assume byte-level addressing and 4-kbyte (2 12 pages) then the 4-Gbyte (2 32) virtual address space is composed of
a) 2 10 pages
b) 2 20 pages
c) 2 30 pages
d) 2 40 pages
Answer »Answer: (b)
Question : 2
In memory management when demand cleaning policy is applied
a) A modified page is written before their page frames are needed to so that pages can be written out in batches.
b) A page is written out to secondary memory only when it has been selected for replacement.
c) A and B both true.
d) None of these.
Answer »Answer: (b)
Question : 3
Which is the correct definition of a valid process transition in an operating system?
a) Wake up: ready ? running
b) Dispatch: ready? running
c) Block: ready ? running
d) Timer runout : ready ? blocked
Answer »Answer: (b)
Question : 4
Following is not true for disk cache
a) It is a buffer in main memory for disk sector
b) It contains the copy of some of the sector on the disk
c) It is bigger is size than main memory
d) It is smaller is size than main memory
Answer »Answer: (c)
Question : 5
Main memory is referred as
a) Virtual memory
b) Real memory
c) A and B both
d) None of these.
Answer »Answer: (b)
Question : 6
The intensive jobs
a) use less processor time than most jobs
b) you are constrained by their I/O requirements
c) run more quickly than processor intensive jobs
d) should all be executed at the same time
Answer »Answer: (b)
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operating system set 1
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