Managing Multiuser Databases Which of the following occurs when a transaction rereads data and finds new rows that were inserted by a command transaction since the prior read? Nonrepeatable read Phantom read Dirty read Consistent read Nonrepeatable read Phantom read Dirty read Consistent read 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 Which of the following disallows both dirty reads and nonrepeatable reads, but allows phantom reads? Serializable Repeatable read Read committed Read uncommitted Serializable Repeatable read Read committed Read uncommitted ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases The advantage of optimistic locking is that: transactions that are best suited are those with a lot of activity. the lock is obtained before the transaction has processed. the lock never needs to be obtained. the lock is obtained only after the transaction has processed. transactions that are best suited are those with a lot of activity. the lock is obtained before the transaction has processed. the lock never needs to be obtained. the lock is obtained only after the transaction has processed. ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Locks placed by command are implicit locks. True False True False ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases A point of synchronization between the database and the transaction log is generally referred to as a stop point. False True False True ANSWER DOWNLOAD EXAMIANS APP
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