Operating System (OS)
The necessary conditions needed before deadlock can occur?

Mutual Exclusion, No Hold and wait, Preemption, Circular Wait
Mutual Exclusion, Hold and wait, No Preemption, Circular Wait
No Mutual Exclusion, Hold and wait, Preemption, Circular Wait
Mutual Exclusion, Hold and wait, Preemption, No Circular Wait

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Operating System (OS)
Virtual Memory

allows multiple programs to reside in separate areas of core at the time.
is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks.
None of these
is a method of allocating processor time.
consists of those addresses that may be generated by a processor during execution of a computation.

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Operating System (OS)
A program

is a sequence of instructions
None of these
is the device where information is stored
is typically characterized by interactive processing and time of the CPU
is a device that performs a sequence of operations specified by instructions in memory.

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