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The transactions like adding an employee, enrolling a student in a course are examples of _______

A. Logical

B. Physical

C. None

D. Theoretical

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  2. ______contains information that defines valid values that are stored in a column or data type.
  3. The ______ key of a relation is the attribute (column) or collection of attributes, which uniquely identify…
  4. Precedence graphs help to find a
  5. Isolation of the transactions is ensured by
  6. Which of the following aggregate functions does not ignore nulls in its results?.
  7. DBMS helps achieve
  8. The drawback of shadow paging technique are
  9. Maximum height of a B+ tree of order m with n key values is
  10. The collection of information stored in a database at a particular moment is called as ......
  11. Manager salary details are hidden from the employee .This is
  12. Union operator is a :
  13. The one guideline to be followed while designing the database is
  14. Dependency preservation is not guaranteed in
  15. In SQL, testing whether a subquery is empty is done using
  16. An advantage of the database management approach is
  17. Which of the following is not a property of transactions?
  18. When an E-R diagram is mapped to tables, the representation is redundant for
  19. The cost of reading and writing temporary files while evaluating a query can be reduced by
  20. Which of the following relational algebraic operations is not from set theory?
  21. DBMS is a collection of _____ that enables user to create and maintain a database.
  22. The default level of consistency in SQL is
  23. A relation is in attribute of other composite key. if an attribute of a composite key is dependent on…
  24. Which of the following is not a characteristic of a relational database model?
  25. If both the functional dependencies : XY and YX hold for two attributes X and Y then the relationship…
  26. The clause alter table in SQL can be used to
  27. Assume transaction A holds a shared lock R. If transaction B also requests for a shared lock on R.
  28. DFD stands for
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  30. A ____ key specifies a uniqueness constraint that no two distinct tuples in any state r of relation…