DBMS-Relational Algebra and Calculus
DBMS-Relational Algebra and Calculus
21. The father of relation database system is :
- Pascal
- C.J. Date
- Dr. Edgar F. Cord
- none of these
22. Who wrote the paper tieled " A Relational Model of Data for Large shared Data Banks"?
- F.R. McFadden
- C.J. Date
- Dr. Edgar F. Cord
- none of these
23. The first large scale implementation of Codd's relational model was IBM's:
- DB2
- system R
- ingress
- none of these
25. What is the following is not a relational database system?
- tuple
- relation
- attribute
- domain
26. What is the cardinality of a table with 1000 rows and 10 columns?
- 10
- 100
- 1000
- none of these.
28. What is the degree of a table with 1000 rows and 10 columns?
- 10
- 100
- 1000
- none of these
29. What is the degree of a table with 5000 rows and 50 columns?
- 50
- 500
- 5000
- none of these
30. Which of the following keys in a table can uniquely identify a row in a table?
- primary key
- alternate key
- candidate key
- all of these.