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In an ER model,_____ is described in the database by storing its data.

A. Entity

B. Attribute

C. Relationship

D. Notation

Correct Answer : A.


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  1. E-R Modeling is achieved by using ____ diagrams
  2. The size of a data item is called its _______, which can be a field of some record or may be a larger…
  3. Which of the following is not a characteristic of a relational database model?
  4. _____ database is used to provide statistical information or summaries of values based on various criteria.
  5. The cost of reading and writing temporary files while evaluating a query can be reduced by
  6. Immediate database modification technique uses
  7. DBMS helps achieve
  8. The fact that all employees of a particular organization should not have salaries more than $10000 is…
  9. Data independence means
  10. In b-tree the number of keys in each node is than the number of its children.
  11. In an E-R, Y is the dominant entity and X is a subordinate entity. Then which of the following is incorrect…
  12. Change Staff table by removing default of Assistant for position column
  13. The transactions like adding an employee, enrolling a student in a course are examples of _______
  14. The full form of GUI is _________
  15. The relational model is based on the concept that data is organized and stored in two-dimensional tables…
  16. The common column is eliminated in
  17. A logical schema
  18. approach reduces time and effort required for design and lesser risk in database management.
  19. A ____ key specifies a uniqueness constraint that no two distinct tuples in any state r of relation…
  20. For correct behaviour during recovery, undo and redo operation must be
  21. Tree structures are used to store data in
  22. Assume transaction A holds a shared lock R. If transaction B also requests for a shared lock on R.
  23. DROP is a statement in SQL.
  24. What is a disjoint less constraint?
  25. Dependency preservation is not guaranteed in
  26. The collection of information stored in a database at a particular moment is called as ......
  27. The language that requires a user to specify the data to be retrieved without specifying exactly how…
  28. The clause in SQL that specifies that the query result should be sorted in ascending or descending order…
  29. Which of the following relational algebraic operations is not from set theory?
  30. In multiple granularity of locks SIX lock is compatible with