If a relation is in third normal form, it does not need to be in second normal form. True False TRUE ANSWER : ? YOUR ANSWER : ?
When mapping a binary many-to-many relationship into a relation which of the following is true? Three relations are created. Two relations are created. Four relations are created. One relation is created. TRUE ANSWER : ? YOUR ANSWER : ?
If no multivalued attributes exist in a relation, then the relation is in what normal form? First normal form Third normal form Fourth normal form Second normal form TRUE ANSWER : ? YOUR ANSWER : ?
A relation has which of the following properties? Attributes can have the same name within a given table. Each row is not unique. The order of the columns is significant. Each relation has a unique name. TRUE ANSWER : ? YOUR ANSWER : ?
Relations are: two-dimensional tables. five-dimensional tables. three-dimensional tables. four-dimensional tables. TRUE ANSWER : ? YOUR ANSWER : ?
The primary key in a relation does not need to be underlined. False True TRUE ANSWER : ? YOUR ANSWER : ?
A primary key is which of the following? An attribute that uniquely identifies each row A derived attribute Any attribute An attribute that uniquely identifies each column TRUE ANSWER : ? YOUR ANSWER : ?
A composite attribute does not get mapped into a relation. False True TRUE ANSWER : ? YOUR ANSWER : ?