Introduction to Database System The activity of a file is a low percentages of number of records added or deleted from a file None of these refers to how closely the files fits into the allocated if high, reduces processing efficiency for sequential and nonsequential files 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 None of these refers to how closely the files fits into the allocated if high, reduces processing efficiency for sequential and nonsequential files is a measure of the percentage of existing records updated during a run ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In a relation, the columns are sometimes called "attributes". True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In a relational schema, each tuple is divided into fields called All of the listed here Domains Queries Relations All of the listed here Domains Queries Relations ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which type of entity has its relationship to another entity determined by an attribute in that other entity called a discriminator? Archetype entity Supertype entity Instance entity Subtype entity Archetype entity Supertype entity Instance entity Subtype entity ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The database administration function includes None of these application programming database access planning computer operations management All of these None of these application programming database access planning computer operations management All of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Given the functional dependency R → S , R is called the determinant. True False True False ANSWER DOWNLOAD EXAMIANS APP
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