Managing Multiuser Databases A transaction in which either all of the database actions occur or none of them do is called: durable. consistent. isolated. atomic. durable. consistent. isolated. atomic. ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases What is the overall responsibility of the DBA? 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. Facilitate the development and use of the database Create and populate tables Development, operation, and maintenance of the database and its applications ANSWER DOWNLOAD EXAMIANS APP
Managing Multiuser Databases The lost update problem is when User A reads data that have been processed by a portion of a transaction from User B. True False True False 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. False True False True 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 Locks placed by command are called ________ . implicit locks exclusive locks shared locks explicit locks implicit locks exclusive locks shared locks explicit locks ANSWER DOWNLOAD EXAMIANS APP
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