Assertion (A): The number of attributes or columns in a relation is called the degree of the relation. Reasoning (R): The number of tuples or records in a relation is called the cardinality of the relation. 1. Both A and R are true and R is the correct explanation of A. 2. Both A and R are true but R is not the correct explanation of A. 3. A is true but R is false. 4. A is false but R is true.

Class - 12 CBSE Computer Science — Assertion Reason Type Questions

Assertion (A): The number of attributes or columns in a relation is called the degree of the relation.
Reasoning (R): The number of tuples or records in a relation is called the cardinality of the relation.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.

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Answer

Both A and R are true but R is not the correct explanation of A.

Explanation
The degree of a relation and the cardinality of a relation are two separate concepts in database management. The number of attributes or columns in a relation is called the degree of the relation, while the number of tuples or records in a relation is called the cardinality of the relation.

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