Test#1 CS488 Fall 2018 8 Acontains at least all of the attribute names and characteristics for each table in the a. data dictionary e. logical schema b. relational schema d. Database hip 9. The entiny relationship model uses the associative entity to represent ale)relations between two or more entitics. a. one-10-one b. one-to-many a entity b. attribute a. TrueFae Total 10 points, 2 points per question) Write True or False in the ()before each question. 1. Each table in a relational database must have a primary key 2. Relationships between entities always operate in one direction. 3. An entity in the entity relationship model corresponds to a table in the relational environment. 4. A disadvantage of the relational database management system (RDBMS) is its inability to hide the complexities of the relational model from the user 5. When two or more tables share the same number of columns, and when their corresponding columns share the same or compatible domains, they are said to be union- compatible. C. Short-Answer Questions (Total 20 points) Write concise but complete answers to each question below. 1. (5 pts) List five functions of database management systems