Introduction to Database System A key: identifies a column. must always be composed of two or more columns. identifies a row. can only be one column. identifies a column. must always be composed of two or more columns. identifies a row. can only be one column. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A database management system can do more than a record management system allows simultaneous access to multiple files None of the listed here Both of the listed here can do more than a record management system allows simultaneous access to multiple files None of the listed here Both of the listed here ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In the relational model, relationships between relations or tables are created by using: candidate keys. composite keys. determinants. foreign keys. candidate keys. composite keys. determinants. foreign keys. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Relationship classes are associations between entity classes. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following indicates the minimum number of entities that must be involved in a relationship? Maximum cardinality Minimum cardinality Greater Entity Count (GEC) ERD Maximum cardinality Minimum cardinality Greater Entity Count (GEC) ERD ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Two files may be joined into a third file if they have a row in common both (b) and (c) None of these they have a field in common they have no records with the same value in the common field they have a row in common both (b) and (c) None of these they have a field in common they have no records with the same value in the common field ANSWER DOWNLOAD EXAMIANS APP
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