The state of the data accessed by an aborted transaction must be restored to what it was just before the transaction started executing. This restoration is known as ________ of transaction.
A. safety
B. protection
C. roll – back
D. revert – back
Answer:C
The state of the data accessed by an aborted transaction must be restored to what it was just before the transaction started executing. This restoration is known as ________ of transaction.
A. safety B. protection C. roll – back D. revert – back