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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

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  1. Which of the following is true for network structure?
  2. Relationships among relationships can be represented in an-E-R model using
  3. Assume transaction A holds a shared lock R. If transaction B also requests for a shared lock on R.
  4. DBMS is a collection of _____ that enables user to create and maintain a database.
  5. ______contains information that defines valid values that are stored in a column or data type.
  6. Union operator is a :
  7. The concept of mapping of ______ entity types is the concept in which the for each strong entity type…
  8. The normalization was first proposed by .
  9. Between DRAM and magnetic disk storage another form of memory, called ______ memory is becoming common…
  10. The collection of information stored in a database at a particular moment is called as ......
  11. Which one is true statement :
  12. ____specifies a search condition for a group or an aggregate.
  13. Maximum height of a B+ tree of order m with n key values is
  14. Which of the following aggregate functions does not ignore nulls in its results?.
  15. The set of all values that can be taken by the attribute is called as _______ of the attribute.
  16. In an E-R, Y is the dominant entity and X is a subordinate entity. Then which of the following is incorrect…
  17. Drop Table cannot be used to drop a table referenced by a ______ constraint.
  18. Which of the following statement on the view concept in SQL is invalid?
  19. The clause in SQL that specifies that the query result should be sorted in ascending or descending order…
  20. What is data integrity?
  21. The full form of GUI is _________
  22. ______ keyword is used to find the number of values in a column.
  23. In SQL the statement select * from R, S is equivalent to
  24. Which of the following constitutes a basic set of operations for manipulating relational data?
  25. The metadata is created by the
  26. Which of the following is not a logical database structure?
  27. Which of the following is not a characteristic of a relational database model?
  28. The fact that information in the data warehouse changes far less often and may be regarded as non-real-time…
  29. A logical schema
  30. The _____ category includes storage media that can be operated on directly by the computers central…