Introduction to Database System A recursive relationship is a relationship between an archetype and an instance of that archetype. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System All instances of an entity class have the same attributes. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The main idea behind computer files is that it is convenient to create them access them store information together arrange them create them access them store information together arrange them ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A data dictionary is a special file that contains None of these All of these the widths of all fields in all files the data types of all fields in all files the names of all fields in all files None of these All of these the widths of all fields in all files the data types of all fields in all files the names of all fields in all files ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The activity of a file None of these 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 is a measure of the percentage of existing records updated during a run None of these 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 is a measure of the percentage of existing records updated during a run ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System You have run an SQL statement that asked the DBMS to display data in a table named USER_TABLES. The results include columns of data labeled "TableName," "NumberOfColumns" and "PrimaryKey." You are looking at ________ . indexes A report metadata user data indexes A report metadata user data ANSWER DOWNLOAD EXAMIANS APP
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