Managing Multiuser Databases The overall responsibility of the DBA is to facilitate the development and use of the database. False True False True ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Locks placed by the DBMS are called ________ . explicit locks shared locks exclusive locks implicit locks explicit locks shared locks exclusive locks implicit locks 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 Which of the following allows dirty reads, nonrepeatable reads and phantom reads to occur? Serializable Read committed Repeatable read Read uncommitted Serializable Read committed Repeatable read Read uncommitted ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Which of the following occurs when a transaction rereads data and finds new rows that were inserted by a command transaction since the prior read? Consistent read Dirty read Phantom read Nonrepeatable read Consistent read Dirty read Phantom read Nonrepeatable read ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Dirty read, nonrepeatable, and phantom reads are not possible in this instance. Repeatable read Read uncommitted Read committed Serializable Repeatable read Read uncommitted Read committed Serializable ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS