System functions that restricts the use of objects to certain users

[Solved] System security is

Q.	System security is
A.	The set of system services and constraints in details
B.	System functions that restricts the use of objects to certain users
C.	Purposeful collection of interrelated components that work together to achieve some objective.
D.	None of these
Answer» B. System functions that restricts the use of objects to certain users

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