Question

in DBMS , which of the following statements about the wound-walt scheme are correct
1 An older transaction is allowed to wait on a younger transaction
2 A younger transaction is allowed to wait on an older transaction
3 if an older transaction requests an item that is held by a younger transaction, then the older one preempts
the younger transaction by aborting the younger one
4 1 a younger transaction requests an item that is held by an older transaction, then the younger transaction
saborted and restarted​

Answer 1

Answer:

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Explanation:

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