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For correct behaviour during recovery, undo and redo operation must be

A. Commutative

B. Associative

C. idempotent

D. distributive

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  1. Checkpoints are a part of
  2. Tree structures are used to store data in
  3. If an entity can belong to only one lower level entity then the constraint is
  4. The graphical representation of a query is .
  5. Manager salary details are hidden from the employee .This is
  6. ____specifies a search condition for a group or an aggregate.
  7. The language that requires a user to specify the data to be retrieved without specifying exactly how…
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    If both the functional dependencies : XY and YX hold for two attributes X and Y then the relationship between X and Y is
  9. Relational Algebra is
  10. _____clause is an additional filter that is applied to the result.
  11. approach reduces time and effort required for design and lesser risk in database management.
  12. Processed data is called _____
  13. Between DRAM and magnetic disk storage another form of memory, called ______ memory is becoming common…
  14. Cascading rollback is avoided in all protocol except
  15. The full form of GUI is _________
  16. Which of the following is not a logical database structure?
  17. Which of the following concurrency control schemes is not based on the serializability property?
  18. Precedence graphs help to find a
  19. In 2NF
  20. The ______ indexes are forced to store only record IDs in the data structure and require at least one…
  21. DBMS helps achieve
  22. Create a table with the following attributes: Employee(EMPNO integer, EMPNAME of 10 characters)
  23. Which of the following is not a property of transactions?
  24. Which of the following ensures the atomicity of the transaction?
  25. An advantage of views is
  26. Which of the syntax is correct for insert statement? i) insert into values ii) insert into (column list)…
  27. Which two files are used during operation of the DBMS?
  28. In an ER diagram the ___shape specifies the Attibute and a ____ shape specifies the primary key attribute.
  29. ______is a special type of integrity constraint that relates two relations & maintains consistency across…
  30. In multiple granularity of locks SIX lock is compatible with