| 11. | Foreign key is the one in which the ________ of one relation is referenced in another relation. |
| Discuss |
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Answer: (b).Primary key
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| 12. | Domain constraints, functional dependency and referential integrity are special forms of _________. |
| Discuss |
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Answer: (c).Assertion
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| 13. | Which one of the following uniquely identifies the elements in the relation? |
| Discuss |
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Answer: (b).Primary key
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| 14. | A _____ is a property of the entire relation, rather than of the individual tuples in which each tuple is unique. |
| Discuss |
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Answer: (b).Key
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| 15. | Which one of the following attribute can be taken as a primary key ? |
| Discuss |
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Answer: (c).Id
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| 16. | Which one of the following cannot be taken as a primary key ? |
| Discuss |
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Answer: (d).Street
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| 17. | A attribute in a relation is a foreign key if the _______ key from one relation is used as an attribute in that relation . |
| Discuss |
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Answer: (b).Primary
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| 18. | The relation with the attribute which is the primary key is referenced in another relation. The relation which has the attribute as primary key is called |
| Discuss |
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Answer: (b).Referencing relation
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| 19. | The ______ is the one in which the primary key of one relation is used as a normal attribute in another relation . |
| Discuss |
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Answer: (c).Referenced relation
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| 20. | A _________ integrity constraint requires that the values appearing in specified attributes of any tuple in the referencing relation also appear in specified attributes of at least one tuple in the referenced relation. |
| Discuss |
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Answer: (a).Referential
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