Operating System (OS)
Which of the following terms refers to the degree to which data in a database system are accurate and correct?

data security
data integrity
None of these
data validity
data independence

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Operating System (OS)
A critical region is

a program segment that often causes unexpected system crashes
a program segment where shared resources are accessed
a program segment that has not been proved bug-free
none is the above
one which is enclosed by a pair of P and V operations on semaphores

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