IT CIS111 TEST BANK OBJECTIVE ASSESSMENT PRACTICE CHAPTER 2: Data Modeling

Chapter 2: Data Modeling Multiple Choice 1. The Entity-Relationship (E-R) model is _____. a. a diagramming technique that describes record structures (i.e. the fields that make up the records of a file) b. an alternative to indexing and hashing as a means for providing direct access in files c. a diagramming technique that describes entities, their attributes, and the relationships between them d. an alternative to file design in which attributes are used instead of fields e. a diagramming technique that relates entities to each other, attributes to each other, and relationships to each other Ans: c Response: See page 20 2. An association between entities is a(n) _____. a. entity type b. entity occurence c. record d. attribute e. relationship Ans: e Response: See page 20 3. A binary relationship is a relationship between two _____. a. entity types b. attribute types c. associations d. files e. cardinalities Ans: a Response: See page 20 4. The term “binary” in binary relationship indicates that the relationship is between a. two halves of an entity type b. two entity types c. two divisions of an entity’s attributes d. two attributes e. two relationships Ans: b Response: See page 20