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CBSE Class 12 Informatics Practices Question 4 of 103

Review of Database Concepts & SQL — Question 4

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4
Question

Question 4

Assertion (A): The number of attributes in a relation is called the degree of the relation.

Reasoning (R): The number of tuples 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.
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.