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 Phantom read Dirty read Nonrepeatable read Consistent read Phantom read Dirty read Nonrepeatable read 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 Locks placed by command are called ________ . explicit locks exclusive locks shared locks implicit locks explicit locks exclusive locks shared locks implicit locks 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 Forward only Static Dynamic Keyset Forward only Static Dynamic ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Which of the following allows dirty reads, nonrepeatable reads and phantom reads to occur? Read uncommitted Serializable Read committed Repeatable read Read uncommitted Serializable Read committed Repeatable read ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Which of the following locks the item from access of any type? Explicit lock Shared lock Exclusive lock Implicit lock Explicit lock Shared lock Exclusive lock Implicit lock ANSWER DOWNLOAD EXAMIANS APP
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