Logical Database Design A primary key is which of the following? An attribute that uniquely identifies each row A derived attribute An attribute that uniquely identifies each column Any attribute An attribute that uniquely identifies each row A derived attribute An attribute that uniquely identifies each column Any attribute ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design A foreign key may be null and still adhere to the referential integrity constraint. False True False True ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design Weak entities do not get mapped into a relation. True False True False 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 When mapping a binary many-to-many relationship into a relation which of the following is true? Four relations are created. Three relations are created. One relation is created. Two relations are created. Four relations are created. Three relations are created. One relation is created. Two relations are created. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design A null value is assigned when no other value applies. False True False True ANSWER DOWNLOAD EXAMIANS APP
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