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? Instance entity Subtype entity Supertype entity Archetype entity Instance entity Subtype entity Supertype entity Archetype entity ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A key: identifies a row. identifies a column. can only be one column. must always be composed of two or more columns. identifies a row. identifies a column. can only be one column. must always be composed of two or more columns. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The master list of an indexed file both (b) and (c) is sorted in ascending order None of these has a number assigned to each record contains only a list of keys and record numbers both (b) and (c) is sorted in ascending order None of these has a number assigned to each record contains only a list of keys and record numbers ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The relational database model was created by E.F. Codd. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System An application where only one user accesses the database at a given time is an example of a(n) ________ . multiuser database application single-user database application data mining database application e-commerce database application multiuser database application single-user database application data mining database application e-commerce database application ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Two files may be joined into a third file if they have a field in common both (b) and (c) they have no records with the same value in the common field None of these they have a row in common they have a field in common both (b) and (c) they have no records with the same value in the common field None of these they have a row in common ANSWER DOWNLOAD EXAMIANS APP
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