The goal of database security is to ensure that only authorized users – McqOptions

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1.	The goal of database security is to ensure that only authorized users can perform authorized activities at authorized times.
A.	1
B.
C.	1
D.
Answer» B.

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A transaction is a series of actions to be taken on the database so that either all of them are performed successfully or none of them are performed at all.
Locks placed by command are implicit locks.
A point of synchronization between the database and the transaction log is generally referred to as a stop point.
In optimistic locking, the assumption is made that conflict will occur.
A phantom read occurs when a transaction rereads data it has previously read and finds modifications or deletions caused by a committed transaction.
The transaction log contains a copy of every database record (or page) after it has changed. These records are called before images.
Locks placed by the DBMS are explicit locks.
Database administration refers to a function that applies to the entire organization.
The lost update problem is when User A reads data that have been processed by a portion of a transaction from User B.
The size of a lock is referred to as lock sizing.