Multiple choice

Which of the given statements are correct? P : Total number of tuples at any one time is known as degree of a relation. Q : Total number of columns that comprises of a relation is known as cardinality of a relation. R : Restrictions can be applied on the value of attributes.

  1. Both P and Q

  2. R only

  3. None of these

  4. All of these

  5. Both P and R

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is a correct choice. Statement R is true because we can apply restrictions on values of attributes these are known as constraints. So, this answer is correct.