Instead of locking index leaf nodes in a two-phase manner, some index – McqOptions

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1.	Instead of locking index leaf nodes in a two-phase manner, some index concurrency- control schemes use on individual key values, allowing other key values to be inserted or deleted from the same leaf.
A.	b+ tree locking
B.	link level locking
C.	key-value locking
D.	next value locking
Answer» D. next value locking

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