Introduction to Database System Data encryption techniques are particularly useful for reducing storage space requirements None of these improving data integrity protecting data in data communication systems All of these reducing storage space requirements None of these improving data integrity protecting data in data communication systems All of these 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 is a measure of the percentage of existing records updated during a run if high, reduces processing efficiency for sequential and nonsequential files None of these refers to how closely the files fits into the allocated 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 if high, reduces processing efficiency for sequential and nonsequential files None of these refers to how closely the files fits into the allocated ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A list consists of last names, first names, addresses, and pin codes if all people in the list have the same last and the same pin code, a useful key would be the last name All of these the pin code a compound key consisting of the first name and the last name None of these the last name All of these the pin code a compound key consisting of the first name and the last name None of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Every time attribute A appears, it is matched with the same value of attribute B, but not the same value of attribute C. Therefore, it is true that: A → A → (B,C). A → (B,C) → A → A → (B,C). A → (B,C) → ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A relational database management (RDBM) package manages data in more than one file at once. How does it organize these file? As relations tuple None of these both (a) and (b) tables relations tuple None of these both (a) and (b) tables 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 tree file an indexed file a sequential file None of these a hashed file a tree file an indexed file a sequential file None of these a hashed file ANSWER DOWNLOAD EXAMIANS APP
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