Managing Multiuser Databases 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. False True False True ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases The transaction log contains a copy of every database record (or page) after it has changed. These records are called before images. True False True False ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases The goal of database security is to ensure that only authorized users can perform authorized activities at authorized times. False True False True ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Which of the following disallows both dirty reads and nonrepeatable reads, but allows phantom reads? Repeatable read Read committed Read uncommitted Serializable Repeatable read Read committed Read uncommitted Serializable ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases An exclusive lock locks the item from change but not from read. True False True False ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases The size of the lock is referred to as the lock granularity. True False True False ANSWER DOWNLOAD EXAMIANS APP
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