DBMS · Question 23 · Medium
DBMS question 23
Relation R has 3 attributes and 5 tuples, and relation S has 4 attributes and 6 tuples (no attribute names in common). What are the degree and cardinality of the Cartesian product R × S?
- Degree 12 and 11 tuples
- Degree 7 and 11 tuples
- Degree 12 and 30 tuples
- Degree 7 and 30 tuples
Answer and explanation
Answer: D. Degree 7 and 30 tuples
Explanation: The Cartesian product has all attributes of both relations, so 3 + 4 = 7 columns, and pairs every tuple of R with every tuple of S, so 5 × 6 = 30 tuples.
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