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? Consistent read Dirty read Phantom read Nonrepeatable read Consistent read Dirty 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 before the transaction has processed. the lock is obtained only after 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 before the transaction has processed. the lock is obtained only after the transaction has processed. the lock never needs to be obtained. 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? Keyset Dynamic Static Forward only Keyset Dynamic Static Forward only 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? Forward only Static Keyset Dynamic Forward only Static Keyset Dynamic 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
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