Managing Multiuser Databases Resource locking is a process to prevent multiple applications from obtaining copies of the same record when the record is about to be changed. True False True False ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases The lost update problem is when User A reads data that have been processed by a portion of a transaction from User B. True False True False ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases When two transactions are being processed against the database at the same time they are termed concurrent transactions. True False True False ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases The size of a lock is referred to as lock sizing. True False True False ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases The advantage of optimistic locking is that: the lock is obtained before the transaction has processed. the lock never needs to be obtained. transactions that are best suited are those with a lot of activity. the lock is obtained only after the transaction has processed. the lock is obtained before the transaction has processed. the lock never needs to be obtained. transactions that are best suited are those with a lot of activity. the lock is obtained only after the transaction has processed. 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. False True False True ANSWER DOWNLOAD EXAMIANS APP
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