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Q 6 . Cosnsider the following locking, protocol. All items are numbered, and once an item is unlocked, only higher - numbered items may be

6 .

Cosnsider the following locking, protocol. All items are numbered, and once an item is unlocked, only higher

-

numbered items may be locked. Locks may be released at any time, Only X

-

locks are used. Show by an example that this protocol does not guarantee serializability.

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