Introduction to Database System Which of the following is not a logical data-base structure? chain network tree relational chain network tree relational ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A relation is in Boyce-Codd Normal Form (BCNF) if every determinant is a composite key. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following is a serious problem of file management systems? program dependence All of these lack of data independence difficult to update data redundancy program dependence All of these lack of data independence difficult to update data redundancy ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In the relational model, relationships between relations or tables are created by using: candidate keys. determinants. composite keys. foreign keys. candidate keys. determinants. composite keys. foreign keys. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System An audit trail is used to make back-up copies can be used to restore lost information All of the listed here is the recorded history of operations performed on a file is used to make back-up copies can be used to restore lost information All of the listed here is the recorded history of operations performed on a file ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System An attribute describes the entity's characteristics. True False True False ANSWER DOWNLOAD EXAMIANS APP
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