Introduction to Database System The DBMS acts as an interface between what two components of an enterprise-class database system? Data and the database The user and the database application Database application and SQL Database application and the database Data and the database The user and the database application Database application and SQL Database application and the database ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which type of entity represents an actual occurrence of an associated generalized entity? Archetype entity Supertype entity Instance entity Subtype entity Archetype entity Supertype entity Instance entity Subtype entity ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System For some relations, changing the data can have undesirable consequences called: referential integrity constraints. transitive dependencies. modification anomalies. normal forms. referential integrity constraints. transitive dependencies. modification anomalies. normal forms. ANSWER DOWNLOAD EXAMIANS APP
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 Subtype entity Supertype entity Instance entity Archetype entity Subtype entity Supertype entity Instance entity ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Every time attribute A appears, it is matched with the same value of attribute B, but not the same value of attribute C. Therefore, it is true that: A → (B,C). (B,C) → A → A → A → (B,C). (B,C) → A → A → ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following is not a restriction for a table to be a relation? The columns must be ordered. The cells of the table must contain a single value. All of the entries in any column must be of the same kind. No two rows in a table may be identical. The columns must be ordered. The cells of the table must contain a single value. All of the entries in any column must be of the same kind. No two rows in a table may be identical. ANSWER DOWNLOAD EXAMIANS APP