Logical Database Design When mapping a supertype/subtype relationship which of the following is true? The subtype primary key is assigned to each supertype. The supertype primary key is assigned to each subtype. There is no link between the supertype/subtype entities. There is no primary key/foreign key relationship between a supertype/subtype. The subtype primary key is assigned to each supertype. The supertype primary key is assigned to each subtype. There is no link between the supertype/subtype entities. There is no primary key/foreign key relationship between a supertype/subtype. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design A synonym is two or more attributes that have different names but the same meaning. True False True False ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design Weak entities do not get mapped into a relation. False True False True ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design A primary key may be null. True False True False ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design The primary key of the new relation in a many-to-many relationship is a composite key comprised of the primary keys of each of the binary entities. False True False True ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design 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. One relation is created. Four relations are created. Three relations are created. Two relations are created. One relation is created. Four relations are created. ANSWER DOWNLOAD EXAMIANS APP
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