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DFD stands for

A. Data Flow Document

B. Data File Diagram

C. Data Flow Diagram

D. Non of the above

Correct Answer : C.


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  1. According to the levels of abstraction, the schema at the intermediate level is called
  2. A list consists of last names, first names, addresses and pin codes. If all people in the list have…
  3. An advantage of the database management approach is
  4. Shadow paging has
  5. DFD stands for
  6. DROP is a statement in SQL.
  7. Grant and revoke are _____ statements.
  8. As per equivalence rules for query transformation, selection operation distributes over
  9. The collection of information stored in a database at a particular moment is called as ......
  10. operator is used to compare a value to a list of literals values that have been specified.
  11. The language that requires a user to specify the data to be retrieved without specifying exactly how…
  12. Data items grouped together for storage purposes are called a
  13. What is a disjoint less constraint?
  14. The common column is eliminated in
  15. The middleware databases in which the business rules act are applicable to _______ tier architectures
  16. The fact that all employees of a particular organization should not have salaries more than $10000 is…
  17. Dependency preservation is not guaranteed in
  18. In multiple granularity of locks SIX lock is compatible with
  19. Between DRAM and magnetic disk storage another form of memory, called ______ memory is becoming common…
  20. In SQL the word natural can be used with
  21. The one guideline to be followed while designing the database is
  22. ______is a preferred method for enforcing data integrity
  23. ____ table store information about database or about the system.
  24. The clause in SQL that specifies that the query result should be sorted in ascending or descending order…
  25. Which of the following is not a logical database structure?
  26. The set of all values that can be taken by the attribute is called as _______ of the attribute.
  27. Processed data is called _____
  28. DBMS is a collection of _____ that enables user to create and maintain a database.
  29. Which of the syntax is correct for insert statement? i) insert into values ii) insert into (column list)…
  30. In a multi-user database, if two users wish to update the same record at the same time, they are prevented…