ict2622 Assignment 3

ASSESSMENTS ASSIGNMENT 3 ASSIGNMENT 3 UNIQUE No: Due Date: 1. In a fully developed use case description the exception conditions represent what? a. What conditions might cause the system to crash. b. What conditions prevent the system from successfully completing the use case. c. What conditions will confuse the actor. d. Where the system might have “bugs” and produce erroneous results. 2. Numbering exception conditions, which often uses hierarchical numbering, in a fully developed use case description is helpful to _______. a. tie exception conditions to other diagrams or descriptions b. show which exception conditions are subordinate to other exceptions c. provide an identifier for each exception condition d. tie the exception condition to a processing step 3. A(n) ____ is a field or set of fields stored in one table that also exists as a primary key in another table. a. primary key b. foreign key c. object identifier d. candidate key 4. Referential integrity is normally enforced by the ____. a. application programmer b. database management system c. operating system