Answer the following statement(s) true (T) or false (F)

1. When a DBMS uses journaling, the update log is part of the same file in which the database is stored.
2. You can improve the performance of the recovery program by having it first scan the log and then apply the last after image.
3. If the database has been destroyed, you can use a rollback to recover the database to a valid state by undoing problem transactions.
4. Encryption converts the data in a database to a format that is indecipherable to unauthorized users who attempt to bypass the DBMS.
5. Authentication refers to techniques for decrypting data when it accessed by authorized users.


1. False
2. True
3. False
4. True
5. False

Business

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Answer the following statement true (T) or false (F)

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Indicate whether the statement is true or false.

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