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Which of the following is not a logical database structure?

A. Chain

B. Network

C. Tree

D. Relational

You can do it
  1. The ______ indexes are forced to store only record IDs in the data structure and require at least one…
  2. Relationships among relationships can be represented in an-E-R model using
  3. Which of the following concurrency control schemes is not based on the serializability property?
  4. The relational model is based on the concept that data is organized and stored in two-dimensional tables…
  5. What is data integrity?
  6. The cost of reading and writing temporary files while evaluating a query can be reduced by
  7. Manager salary details are hidden from the employee .This is
  8. The clause in SQL that specifies that the query result should be sorted in ascending or descending order…
  9. Which of the following relational algebraic operations is not from set theory?
  10. A list consists of last names, first names, addresses and pin codes. If all people in the list have…
  11. The _______ is a set of programs to use and / or modify this data.
  12. As per equivalence rules for query transformation, selection operation distributes over
  13. Dependency preservation is not guaranteed in
  14. An advantage of views is
  15. ______is a special type of integrity constraint that relates two relations & maintains consistency across…
  16. DBMS helps achieve
  17. The keyword to eliminate duplicate rows from the query result in SQL is
  18. Grant and revoke are _____ statements.
  19. Isolation of the transactions is ensured by
  20. In multiple granularity of locks SIX lock is compatible with
  21. A logical schema
  22. Create a table with the following attributes: Employee(EMPNO integer, EMPNAME of 10 characters)
  23. In b-tree the number of keys in each node is than the number of its children.
  24. Which of the following is true for network structure?
  25. Shadow paging has
  26. ____ table store information about database or about the system.
  27. What is a disjoint less constraint?
  28. operator is used to compare a value to a list of literals values that have been specified.
  29. A data type or format is specified for each _________
  30. ………………… approach reduces time and effort required for design…