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______contains information that defines valid values that are stored in a column or data type.

A. Default

B. Index

C. Rule

D. View

Correct Answer : B.


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  1. Which of the following concurrency control schemes is not based on the serializability property?
  2. _____ command can be used to modify a column in a table
  3. Relational Algebra does not have
  4. Which of the following is a reason to model data?
  5. operator is used to compare a value to a list of literals values that have been specified.
  6. The data in the database at a particular moment of time is called the _______
  7. A list consists of last names, first names, addresses and pin codes. If all people in the list have…
  8. Maximum height of a B+ tree of order m with n key values is
  9. If a transaction T has obtained an exclusive lock on item Q, then T can
  10. A DBMS is a ____ user if at most one user can use the system and is mostly restricted to personal computer…
  11. The _____ category includes storage media that can be operated on directly by the computers central…
  12. Which of the following relational algebra operations do not require the participating tables to be union-compatible?
  13. Grant and revoke are _____ statements.
  14. _____ database is used to provide statistical information or summaries of values based on various criteria.
  15. The division operator divides a dividend A of degree m+n by a divisor relation B of degree n and produces…
  16. If an entity can belong to only one lower level entity then the constraint is
  17. In an ER diagram the ___shape specifies the Attibute and a ____ shape specifies the primary key attribute.
  18. Which of the following addressing modes permits relocation without any change over in the code?
  19. The statement that is executed automatically by the system as a side effect of the modification of the…
  20. As per equivalence rules for query transformation, selection operation distributes over
  21. Which of the following is not a consequence of non-normalized database?
  22. The metadata is created by the
  23. Which of the following ensures the atomicity of the transaction?
  24. Between DRAM and magnetic disk storage another form of memory, called ______ memory is becoming common…
  25. E-R Modeling is achieved by using ____ diagrams
  26. The normal form that is not necessarily dependency preserving is
  27. Assume transaction A holds a shared lock R. If transaction B also requests for a shared lock on R.
  28. The relational model is based on the concept that data is organized and stored in two-dimensional tables…
  29. The drawback of shadow paging technique are
  30. A logical schema