Introduction to Database System All instances of an entity class have the same attributes. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following is not characteristic of a relational database model? complex logical relationships tables treelike structure records complex logical relationships tables treelike structure records ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following refers to an entity in which the identifier of one entity includes the identifier of another entity? Strong entity ID-independent entity Weak entity ID-dependent entity Strong entity ID-independent entity Weak entity ID-dependent entity ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A list consists of last names, first names, addresses, and pin codes if all people in the list have the same last and the same pin code, a useful key would be None of these the last name a compound key consisting of the first name and the last name All of these the pin code None of these the last name a compound key consisting of the first name and the last name All of these the pin code ANSWER DOWNLOAD EXAMIANS APP
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 of the following products was an early implementation of the relational model developed by E.F. Codd of IBM? DB2 R:base dBase-II IDMS DB2 R:base dBase-II IDMS ANSWER DOWNLOAD EXAMIANS APP
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