Operating System (OS)
The most common security failure is

too much emphasis on preventing physical access
insufficient technology used to prevent breaches
depending on passwords
None of these
carelessness by users

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Operating System (OS)
Under virtual storage,

two or more programs are stored concurrently in primary storage
None of these
interprogram interference may occur
only the active pages of a program are stored in primary storage
a single program is processed by two or more CPUs

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