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

None of these
data validity
data independence
data integrity
data security

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Operating System (OS)
A real time operating system is most likely to be used for which of the following task?

Controlling access to a shared printer in a network
Controlling the fuel injection system of an automobile engines
Managing the access to system files in a laptop computers
Ensuring that system clock works correctly on server

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