In ________ no two aborts occur unless two concurrent transactions update the same data item.

In ________ no two aborts occur unless two concurrent transactions up

1.	In ________ no two aborts occur unless two concurrent transactions update the same data item.
A.	Multiversion scheme
B.	Timestamp protocol
C.	Lock based protocol
D.	Snapshot isolation
Answer» E.

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In ________ no two aborts occur unless two concurrent transactions update the same data item.

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