What is the act of exchanging one lock an application holds on a resource for a more
restrictive lock on the same resource known as?
A.
Lock conversion/promotion
B.
Lock switch/exchange
C.
Lock substitution
D.
Lock escalation
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Lock conversion. Changing the mode of a lock that is already held is called lock conversion. Lock conversion occurs when a process accesses a data object on which it already holds a lock, and the access mode requires a more restrictive lock than the one already held.
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