Introduction to Database System Keys made up of two or more attributes are called composite keys. False True False True 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? Instance entity Supertype entity Archetype entity Subtype entity Instance entity Supertype entity Archetype entity Subtype entity ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Updating a database means revising the file structure all of the listed here reorganizing the database modifying or adding record occurrences revising the file structure all of the listed here reorganizing the database modifying or adding record occurrences 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) → A → A → (B,C). A → (B,C) → A → A → (B,C). ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A command that lets you change one or more fields in a record is None of these Look-up All of these Insert Modify None of these Look-up All of these Insert Modify ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following is not characteristic of a relational database model? treelike structure complex logical relationships records tables treelike structure complex logical relationships records tables ANSWER DOWNLOAD EXAMIANS APP
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