Mysystem.org IT ExamsCISSP-Question-436 2017-04-02
Question: Database software performs three main types of integrity services: semantic,referential, and entity. Which of the following correctly describes one of these services?
i.A semantic integrity mechanism makes sure structural and semantic rules are enforced.
ii. A database has referential integrity if all foreign keys reference existing primary keys.
iii. Entity integrity guarantees that the tuples are uniquely identified by primary key values.
Answer ==> A. i,ii, iii
B. ii, iii
C. i, ii