Operating System (OS)
The memory allocation scheme subject to "external" fragmentation is

segmentation
pure demand paging
swapping
multiple contiguous fixed partitions
None of these

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Operating System (OS)
What is the method of handling deadlocks?

Use a protocol to ensure that the system will never enter a deadlock state
All of these
Pretend that deadlocks never occur in the system
Allow the system to enter the deadlock state and then recover

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