In a rollforward , the DBMS uses the log to undo any changes made to a database during a certain period, such as an hour.

Name: In a rollforward , the DBMS uses the log to undo any changes made to a database during a certain period, such as an hour.
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In a rollforward, the DBMS uses the log to redone any transactions made to a database during a certain period of time, usually after a system failure or backup. It does not undo changes made during that period.

In a Rollforward , the DBMS Uses the Log to Undo