How can referential integrity best be defined?
A. Structural and semantic rules are enforced. B. Semantic rules are enforced. C. Structural rules are enforced. D. All foreign keys reference existing primary keys. • Lenny is trying to determine how much money a new employee makes. His job in HR allows him to see total payroll by department but not by person. The individual he is curious about just started a month ago, so Lenny simply compares that department’s previous month’s total salary to the current month’s total salary. What has Lenny just done? A. Enumeration B. An inference attack C. Polyinstantiation D. Online transaction processing (OLTP) • While browsing the company directory, you notice that your address is incorrect. To rectify the situation, you decide to modify the database that holds this information. Although the change seems to work, you notice later that the information has reverted to the previous, incorrect information. What do you believe is the source of the problem? A. The user does not have modification righ
