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Database Questions and Answers

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13. ______ means that the data contained in a database is accurate and reliable.
 
  • A. Data integrity
  • B. Data reliability
  • C. Data consistency
  • D. Data redundancy
 
14. Rows of a relation are called
 
  • A. Data structure
  • B. Tuples
  • C. Relation
  • D. An entity
 
 
15. In a ER diagram, an entity key of one file that also appears in another file
 
  • A. Primary key
  • B. Foreign key
  • C. Physical key
  • D. Logical key
 
16. Periodically adding, changing and deleting file records is called ______ file.
 
  • A. Updating
  • B. Upgrading
  • C. Restructuring
  • D. Renewing