Managing Multiuser Databases Which of the following locks the item from access of any type? Explicit lock Exclusive lock Shared lock Implicit lock Explicit lock Exclusive lock Shared lock Implicit lock ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases In this instance, dirty reads are disallowed, while nonrepeatable reads and phantom reads are allowed. Serializable Repeatable read Read uncommitted Read committed Serializable Repeatable read Read uncommitted Read committed ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Which of the following allows dirty reads, nonrepeatable reads and phantom reads to occur? Serializable Read uncommitted Read committed Repeatable read Serializable Read uncommitted Read committed Repeatable read ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Locks placed by the DBMS are called ________ . shared locks implicit locks explicit locks exclusive locks shared locks implicit locks explicit locks exclusive locks ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases The advantage of optimistic locking is that: 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. 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. 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. False True False True ANSWER DOWNLOAD EXAMIANS APP
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