Managing Multiuser Databases Which of the following occurs when a transaction rereads data it has previously read and finds modification or deletions caused by a committed transaction? Dirty read Consistent read Phantom read Nonrepeatable read Dirty read Consistent read Phantom read Nonrepeatable read 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 only after the transaction has processed. the lock never needs to be obtained. the lock is obtained before the transaction has processed. transactions that are best suited are those with a lot of activity. the lock is obtained only after the transaction has processed. the lock never needs to be obtained. the lock is obtained before the transaction has processed. ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Which of the following refers to a cursor type that when the cursor is opened, a primary key value is saved for each row in the recordset; when the application accesses a row, the key is used to fetch the current values of the row? Dynamic Forward only Static Keyset Dynamic Forward only Static Keyset ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Which of the following refers to a cursor type where changes of any type and from any source are visible? Dynamic Keyset Forward only Static Dynamic Keyset Forward only Static ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Which of the following disallows both dirty reads and nonrepeatable reads, but allows phantom reads? Read uncommitted Serializable Repeatable read Read committed Read uncommitted Serializable Repeatable read Read committed ANSWER DOWNLOAD EXAMIANS APP
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