Question

Transactions that have written their commit entry in the log must also have recorded all their ______ in the log; otherwise they would not be committed, so their effect on the database can be redone from the log entries. (Notice that the log file must be kept on disk.)

1) changes
2) updates
3) modifications
4) transactions

Answer 1

Transactions that have written their commit entry in the log must also have recorded all their changes in the log.

Step-by-step explanation:

Transactions that have written their commit entry in the log must also have recorded all their changes in the log; otherwise they would not be committed, so their effect on the database can be redone from the log entries. (Notice that the log file must be kept on disk.)