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प्रश्न
A relation in MySQL database consists of 2 tuples and 3 attributes. If 2 attributes are deleted and 4 tuples are added, what will be the cardinality of the relation?
पर्याय
4
5
6
7
MCQ
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उत्तर
6
Explanation:
Cardinality of a relation is the number of tuples (rows) it contains.
Originally, there are 2 tuples and 4 more are added, so cardinality = 2 + 4 = 6.
(Deleting 2 attributes changes the degree (number of columns), not the cardinality.)
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