Introduction to Database System Entities use identifiers while tables use keys. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System For some relations, changing the data can have undesirable consequences called: referential integrity constraints. modification anomalies. normal forms. transitive dependencies. referential integrity constraints. modification anomalies. normal forms. transitive dependencies. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The activity of a file if high, reduces processing efficiency for sequential and nonsequential files is a low percentages of number of records added or deleted from a file is a measure of the percentage of existing records updated during a run 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 low percentages of number of records added or deleted from a file is a measure of the percentage of existing records updated during a run None of these refers to how closely the files fits into the allocated ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following is not a restriction for a table to be a relation? The cells of the table must contain a single value. The columns must be ordered. All of the entries in any column must be of the same kind. No two rows in a table may be identical. The cells of the table must contain a single value. The columns must be ordered. All of the entries in any column must be of the same kind. No two rows in a table may be identical. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The way a particular application views the data from the data base that the application uses is a : schema None of these module relational model subschema schema None of these module relational model subschema ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A recursive relationship is a relationship between an entity and ________ . an archetype entity a subtype entity an instance entity itself an archetype entity a subtype entity an instance entity itself ANSWER DOWNLOAD EXAMIANS APP
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