Introduction to Database System Which type of entity is related to two or more associated entities that each contain specialized attributes that apply to some but not all of the instances of the entity? Archetype entity Supertype entity Subtype entity Instance entity Archetype entity Supertype entity Subtype entity Instance entity ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which type of entity represents an actual occurrence of an associated generalized entity? Supertype entity Archetype entity Instance entity Subtype entity Supertype entity Archetype entity Instance entity Subtype entity ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A relation is in Boyce-Codd Normal Form (BCNF) if every determinant is a composite key. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Queries to a database All of these both (a) and (b) are written in English can use aggregate functions like SUM and COUNT None of these All of these both (a) and (b) are written in English can use aggregate functions like SUM and COUNT None of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The only reason for the existence of relations is to store instances of functional dependencies. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which type of entity has its relationship to another entity determined by an attribute in that other entity called a discriminator? Subtype entity Archetype entity Instance entity Supertype entity Subtype entity Archetype entity Instance entity Supertype entity ANSWER DOWNLOAD EXAMIANS APP
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