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 Which of the following statement is incorrect?

AVolatile storage refers to main and cache memory and is usually fast.

BVolatile storage can survive system crashes or system power down.

CDisk and tapes (non volatile storage) can survive system crashes or system power down.

DStable storage (disk) refers to storage that technically can never be lost as there are redundant backup copies of data.

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Answer: Option B

Explanation:

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 What does the following statement result in?

Two processes want to write a file to a print spool area at the same time and both start writing. As the print spool area is of fixed size, it fills up before either process finishes writing its file, so both wait for more space to become available.

AStarvation

BThrashing

CDeadlock

DBlocking

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Answer: Option C

Explanation:

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 Thrashing can be avoided if

AThe pages, belonging to the working set of the programs, are in main memory

BThe speed of CPU is increased

CThe speed of I/O processor are increased

DAll of the above

Answer: Option A

Explanation:

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 The contents of a file will be lost if it is opened in

Aa mode

Bw+ mode

Ca+ mode

Dr mode

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Answer: Option B

Explanation:

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 Daisy chain is a device for

Aconnecting a number of controllers to a device

Bconnecting a number of device to a controller

Call of above

Dnone of above

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Answer: Option B

Explanation:

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 Root directory of a disk should be placed

Aat the fixed address in the main memory

Bat a fixed location on the disk

Cat the fixed location on system disk

Danywhere on the disk

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Answer: Option B

Explanation:

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 Fragmentation of a file system

Aoccurs only is file is not used properly

Bcan always be prevented

Chappens in all file systems

Dcan be removed by compaction

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Answer: Option B

Explanation:

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 Disk scheduling includes deciding

Awhich should be accessed next

Border in which disk access requests must be serviced

Cthe physical location of the file

Dthe logical location of the file

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Answer: Option B

Explanation:

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 Dispatcher function is to

Aput tasks in I/O wait

Bschedule tasks in processor

Cchange task priorities

DAll of Above

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Answer: Option A

Explanation:

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 How many primary partitions can be created?

A1

B2

C3

D4

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Answer: Option C

Explanation:

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