Introduction to Database System A key: identifies a column. must always be composed of two or more columns. can only be one column. identifies a row. identifies a column. must always be composed of two or more columns. can only be one column. identifies a row. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A relation has cells that hold multi-value entries. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A relation in this form is free of all modification anomalies. Domain/key normal form First normal form Second normal form Third normal form Domain/key normal form First normal form Second normal form Third normal form ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The highest level in the hierarchy of data organization is called data record database data bank data file data record database data bank data file 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 The main idea behind computer files is that it is convenient to access them store information together create them arrange them access them store information together create them arrange them ANSWER DOWNLOAD EXAMIANS APP
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