Introduction to Database System Periodically adding, changing and deleting file records is called file renewing Updating upgrading restructuring renewing Updating upgrading restructuring ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The physical location of a record is determined by a mathematical formula that transforms a file key into a record location in a hashed file an indexed file None of these a sequential file a tree file a hashed file an indexed file None of these a sequential file a tree file ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A computer file can be best described as a single data item None of these an orderly collection of data items a general collection of data items a random collection of data items a single data item None of these an orderly collection of data items a general collection of data items a random collection of data items ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In a relation, the rows are sometimes called "records". True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A _____ means that one record in a particular record type may be related to more than one record of another record type. Many-to-one relationship One-to-one relationship Many-to many relationship One-to-many relationship Many-to-one relationship One-to-one relationship Many-to many relationship One-to-many relationship ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The activity of a file is a low percentages of number of records added or deleted from 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 if high, reduces processing efficiency for sequential and nonsequential files is a low percentages of number of records added or deleted from 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 if high, reduces processing efficiency for sequential and nonsequential files ANSWER DOWNLOAD EXAMIANS APP
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