Managing Multiuser Databases When one transaction reads a changed record that has not been committed to the database a filthy read occurs. True False True False ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases A phantom read occurs when a transaction rereads data it has previously read and finds modifications or deletions caused by a committed transaction. False True False True ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases The goal of database security is to ensure that only authorized users can perform authorized activities at authorized times. True False True False ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Locks placed by command are implicit locks. False True False True ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Dirty read, nonrepeatable, and phantom reads are not possible in this instance. Read committed Serializable Read uncommitted Repeatable read Read committed Serializable Read uncommitted Repeatable read 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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