In a multi-user database, if two users wish to update the same record at the same time, they are prevented from doing so by

A. jamming

B. password

C. documentation

D. record lock

You can do it
  1. The one guideline to be followed while designing the database is
  2. Data independence means
  3. The set of all values that can be taken by the attribute is called as _______ of the attribute.
  4. A ______ module is typically designed so that it will run on a user workstation or personal computer.
  5. In an E-R diagram double lines indicate
  6. The ______ key of a relation is the attribute (column) or collection of attributes, which uniquely identify…
  7. Which of the following is a reason to model data?
  8. The _____ category includes storage media that can be operated on directly by the computers central…
  9. The graphical representation of a query is .
  10. The data in the database at a particular moment of time is called the _______
  11. The language that requires a user to specify the data to be retrieved without specifying exactly how…
  12. Which of the following is not a consequence of concurrent operations?
  13. ____specifies a search condition for a group or an aggregate.
  14. The full form of GUI is _________
  15. Drop Table cannot be used to drop a table referenced by a ______ constraint.
  16. Which of the following is not a characteristic of a relational database model?
  17. Whenever two independent one-to-many relationships are mixed in the same relation, a __________ arises.
  18. A list consists of last names, first names, addresses and pin codes. If all people in the list have…
  19. A data type or format is specified for each _________
  20. For using a specific database command is used.
  21. approach reduces time and effort required for design and lesser risk in database management.
  22. _____clause is an additional filter that is applied to the result.
  23. Precedence graphs help to find a
  24. The statement that is executed automatically by the system as a side effect of the modification of the…
  25. An advantage of the database management approach is
  26. When an E-R diagram is mapped to tables, the representation is redundant for
  27. DBMS helps achieve
  28. Which one is correct statement?Logical data independence provides following without changing application…
  29. A weak entity has an ______ dependency on its owner entity, which can be used for both ON UPDATE and…
  30. It is an abstraction through which relationships are treated as higher level entities