CIS 336 Final Exam 1 CIS 336 Final Exam 1 | 页面 2

4. (TCO 2) In a "one-to-many" relationship, which constraint is usually added to the "many" table? (Points : 4) UNIQUE PRIMARY KEY FOREIGN KEY NOT NULL 5. (TCO 3) A ____ occurs when a relationship is improperly or incompletely identified and, therefore, is represented in a way that is not consistent with the real world. (Points : 4) surrogate primary keys time-variant data design trap fan trap 6. (TCO 3) All of the following are true about a prime attribute except_____________. (Points : 4) it is a key attribute it is at least part of a key it is not a key attribute it may be part of a composite key 7. (TCO 3) The conflicts between design efficiency, information requirements, and processing speed are often resolved through_____________. (Points : 4) conversion from 1NF to 2NF conversion from 2NF to 3NF compromises that include denormalization conversion from 3NF to 4NF