Introduction to Database System The activity of a file refers to how closely the files fits into the allocated None of these is a measure of the percentage of existing records updated during a run is a low percentages of number of records added or deleted from a file if high, reduces processing efficiency for sequential and nonsequential files refers to how closely the files fits into the allocated None of these is a measure of the percentage of existing records updated during a run is a low percentages of number of records added or deleted from a file if high, reduces processing efficiency for sequential and nonsequential files ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System An identifier determines the type of relationship that an entity has. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A key is a group of one or more attributes that uniquely identifies a row. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Sort/report generators require more disk space than index/report generators are faster than index/report generators none of the listed here do not need to sort before generating a report require more disk space than index/report generators are faster than index/report generators none of the listed here do not need to sort before generating a report ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A relation is in this form if it is in BCNF and has no multivalued dependencies: second normal form. domain/key normal form. third normal form. fourth normal form. second normal form. domain/key normal form. third normal form. fourth normal form. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In the relational model, relationships between relations or tables are created by using: determinants. foreign keys. candidate keys. composite keys. determinants. foreign keys. candidate keys. composite keys. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS