Operating System (OS)
Four necessary conditions for deadlock to exist are: mutual exclusion, no-preemption, circular wait and

deadlock avoidance
race around condition
hold and wait
buffer overflow
None of these

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Operating System (OS)
Multiprogramming systems:

are easier to develop than single programming system
are used only on large mainframe computers
None of these
execute each job faster
execute more jobs in the same time period

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Operating System (OS)
Identify false statement

You can restore any files in recycle bin if you ever need
You can increase free space of disk by sending files in recycle bin
You can right click and choose Empty Recycle Bin to clean it at once
You can find deleted files in recycle bin

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