31. | In the relational models, cardinality is termed as: |
a. | Number of tuples |
b. | Number of attributes |
c. | Number of table |
d. | Number of constraints |
View Answer Report Discuss Too Difficult! Search Google |
Answer: (a).Number of tuples
|
32. | In a relational model, relations are termed as |
a. | Tuples |
b. | Attributes |
c. | Rows |
d. | Tables |
View Answer Report Discuss Too Difficult! Search Google |
Answer: (d).Tables
|
33. | A relational database developer refers to a record as |
a. | a criteria |
b. | a relation |
c. | a tuple |
d. | an attribute |
View Answer Report Discuss Too Difficult! Search Google |
Answer: (c).a tuple
|
34. | The relational model feature is that there |
a. | is no need for primary key data |
b. | is much more data independence than some other database models |
c. | are explicit relationships among records |
d. | are tables with many dimensions |
View Answer Report Discuss Too Difficult! Search Google |
Answer: (b).is much more data independence than some other database models
|
35. | Key to represent relationship between tables is called |
a. | Primary key |
b. | Secondary Key |
c. | Foreign Key |
d. | None of these |
View Answer Report Discuss Too Difficult! Search Google |
Answer: (c).Foreign Key
|
36. | In a relation |
a. | Ordering of rows is immaterial |
b. | No two rows are identical |
c. | a and b both are true |
d. | None of these |
View Answer Report Discuss Too Difficult! Search Google |
Answer: (c).a and b both are true
|
37. | The RDBMS terminology for a row is |
a. | tuple |
b. | relation |
c. | attribute |
d. | degree |
View Answer Report Discuss Too Difficult! Search Google |
Answer: (a).tuple
|
38. | Which of the operations constitute a basic set of operations for manipulating relational data? |
a. | Predicate calculus |
b. | Relational calculus |
c. | Relational algebra |
d. | None of the above |
View Answer Report Discuss Too Difficult! Search Google |
Answer: (c).Relational algebra
|
39. | A primary key is combined with a foreign key creates |
a. | Parent-Child relation ship between the tables that connect them |
b. | Many to many relationship between the tables that connect them |
c. | Network model between the tables that connect them |
d. | None of the above |
View Answer Report Discuss Too Difficult! Search Google |
Answer: (a).Parent-Child relation ship between the tables that connect them
|
40. | A primary key if combined with a foreign key creates |
a. | Parent-Child relationship between the tables that connect them |
b. | Many to many relationship between the tables that connect them |
c. | Network model between the tables that connect them |
d. | None of the above |
View Answer Report Discuss Too Difficult! Search Google |
Answer: (a).Parent-Child relationship between the tables that connect them
|