Dependency preservation is not guaranteed in


B. 3NF



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  1. The data models defined by ANSI/SPARC architecture are
  2. The rule that a value of a foreign key must appear as a value of some specific table is called a
  3. Which of the following statement on the view concept in SQL is invalid?
  4. Union operator is a :
  5. If an entity can belong to only one lower level entity then the constraint is
  6. Between DRAM and magnetic disk storage another form of memory, called ______ memory is becoming common…
  7. Which of the following is a reason to model data?
  8. Which of the following is not comparison operator?
  9. The statement that is executed automatically by the system as a side effect of the modification of the…
  10. A top-to-bottom relationship among the items in a database is established by a
  11. _____ command can be used to modify a column in a table
  12. The metadata is created by the
  13. The size of a data item is called its _______, which can be a field of some record or may be a larger…
  14. An outstanding functionality of SQL is its support for automatic_____ to the target data.
  15. Relations produced from an E-R model will always be
  16. DROP is a statement in SQL.
  17. ______ keyword is used to find the number of values in a column.
  18. When an E-R diagram is mapped to tables, the representation is redundant for
  19. DBMS is a collection of _____ that enables user to create and maintain a database.
  20. If two relations R and S are joined, then the non matching tuples of both R and S are ignored in
  21. Processed data is called _____
  22. The normal form that is not necessarily dependency preserving is
  23. A ____ key specifies a uniqueness constraint that no two distinct tuples in any state r of relation…
  24. Protection of data from unauthorized Disclosure results in loss of _______
  25. An advantage of the database management approach is
  26. The data in the database at a particular moment of time is called the _______
  27. Create a table with the following attributes: Employee(EMPNO integer, EMPNAME of 10 characters)
  28. The clause in SQL that specifies that the query result should be sorted in ascending or descending order…
  29. The values of the attribute describes a particular
  30. If the closure of an attribute set is the entire relation then the attribute set is a