Managing Multiuser Databases An exclusive lock locks the item from change but not from read. True False True False 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. False True False True 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. 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 Which of the following allows dirty reads, nonrepeatable reads and phantom reads to occur? Read committed Serializable Repeatable read Read uncommitted Read committed Serializable Repeatable read Read uncommitted ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Which of the following occurs when one transaction reads a changed record that has not been committed to the database? Nonrepeatable read Dirty read Phantom read Consistent read Nonrepeatable read Dirty read Phantom read Consistent read ANSWER DOWNLOAD EXAMIANS APP
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