Introduction to Database System Which of the following is NOT a basic element of all versions of the E-R model? Attributes Relationships Primary keys Entities Attributes Relationships Primary keys Entities 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: (B,C) → A → A → A → (B,C). (B,C) → A → A → A → (B,C). ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A primary key is a composite key that was selected to be the main identifier for the relation. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The following are components of a database except ________ . metadata indexes user data reports metadata indexes user data reports ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System If a piece of data is stored in two places in the database, then it can be more easily accessed changing the data is one spot will cause data inconsistency storage space is wasted None of these both (a) and (b) it can be more easily accessed changing the data is one spot will cause data inconsistency storage space is wasted None of these both (a) and (b) ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A top-to-bottom relationship among the items in a database is established by a Relational schema Hierarchical schema All of the listed here Network schema Relational schema Hierarchical schema All of the listed here Network schema ANSWER DOWNLOAD EXAMIANS APP
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