Logical Database Design Normalization is a formal process for deciding which attributes should be grouped together in a relation. True False True False ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design The entity integrity rule states that: no primary key may be equal to a value in a foreign key. no primary key attribute may be null. no primary key may be unique. no primary key can be composite. no primary key may be equal to a value in a foreign key. no primary key attribute may be null. no primary key may be unique. no primary key can be composite. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design When mapping a supertype/subtype relationship which of the following is true? There is no primary key/foreign key relationship between a supertype/subtype. The supertype primary key is assigned to each subtype. The subtype primary key is assigned to each supertype. There is no link between the supertype/subtype entities. There is no primary key/foreign key relationship between a supertype/subtype. The supertype primary key is assigned to each subtype. The subtype primary key is assigned to each supertype. There is no link between the supertype/subtype entities. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design If no multivalued attributes exist and no partial dependencies exist in a relation, then the relation is in what normal form? Second normal form First normal form Fourth normal form Third normal form Second normal form First normal form Fourth normal form Third normal form ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design If a relation is in third normal form, it does not need to be in second normal form. False True False True ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design A transitive dependency is which of the following? A functional dependency between two or more nonkey attributes. A relation that is in first normal form. A functional dependency between two or more key attributes. A relation that is in second normal form. A functional dependency between two or more nonkey attributes. A relation that is in first normal form. A functional dependency between two or more key attributes. A relation that is in second normal form. ANSWER DOWNLOAD EXAMIANS APP
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