In the ___________ scheme, a transaction that wants to update the database first creates a complete copy of the database.
A. Shadow copy
B. Shadow Paging
C. Update log records
D. All of the mentioned
Answer:A
In the ___________ scheme, a transaction that wants to update the database first creates a complete copy of the database.
A. Shadow copy B. Shadow Paging C. Update log records D. All of the mentioned