Managing Multiuser Databases Locks placed by the DBMS are called ________ . shared locks implicit locks exclusive locks explicit locks shared locks implicit locks exclusive locks explicit locks ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases A transaction is a series of actions to be taken on the database so that either all of them are performed successfully or none of them are performed at all. True False True False ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Which of the following locks the item from change but not from read? Explicit lock Shared lock Exclusive lock Implicit lock Explicit lock Shared lock Exclusive lock Implicit lock ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Which of the following disallows both dirty reads and nonrepeatable reads, but allows phantom reads? Repeatable read Read uncommitted Read committed Serializable Repeatable read Read uncommitted Read committed Serializable ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases Locks placed by command are called ________ . explicit locks implicit locks exclusive locks shared locks explicit locks implicit locks exclusive locks shared locks 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? Phantom read Nonrepeatable read Dirty read Consistent read Phantom read Nonrepeatable read Dirty read Consistent read ANSWER DOWNLOAD EXAMIANS APP
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