DBMS-DBMS CONCEPT
DBMS-DBMS CONCEPT
21. DBMS manage concurrent databases access and prevents from the problem and their mapping to the loss of integrity.
- TRUE
- FALSE
22. View definition language is used to specify the conceptual schema in the database.
- TRUE
- FALSE
23. Data storage definition language is used to specify the conceptual schema in the database.
- TRUE
- FALSE
24. Structured query language (SQL) and query by example (QBE) are the examples of fourth-generation language.
- TRUE
- FALSE
25. A transaction cannot update a record, delete a record, modify a set of records and so on.
- TRUE
- FALSE
26. Which of the following is related to information?
- data
- communication
- knowledge
- all of these
28. Which of the following is element of the database ?
- data
- constraints and schema
- relationships
- all of these
29. What represent a correspondence between the various data elements?
- data
- constraints
- relationships
- schema
30. Which of the following is an advantage of using database system?
- security enforcement
- avoidance of redundancy
- reduced inconsistency
- all of these