Managing Multiuser Databases A durable transaction is one in which all committed changes are permanent. False True False True ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases The advantage of optimistic locking is that: the lock is obtained only after the transaction has processed. the lock is obtained before the transaction has processed. transactions that are best suited are those with a lot of activity. the lock never needs to be obtained. the lock is obtained only after the transaction has processed. the lock is obtained before the transaction has processed. transactions that are best suited are those with a lot of activity. the lock never needs to be obtained. ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Two transactions that run concurrently and generate results that are consistent with the results that would have occurred if they had run separately are referred to as serializable transactions. True False True False ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases What is the overall responsibility of the DBA? Facilitate the development and use of the database Create and populate tables Development, operation, and maintenance of the database and its applications Both the first and third answers above are correct. Facilitate the development and use of the database Create and populate tables Development, operation, and maintenance of the database and its applications Both the first and third answers above are correct. ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Which of the following allows dirty reads, nonrepeatable reads and phantom reads to occur? Read uncommitted Repeatable read Read committed Serializable Read uncommitted Repeatable read Read committed Serializable ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Which of the following locks the item from access of any type? Exclusive lock Implicit lock Shared lock Explicit lock Exclusive lock Implicit lock Shared lock Explicit lock ANSWER DOWNLOAD EXAMIANS APP
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