Multiple choice

Which of the following statements is/are correct?

P: Total number of tuples at any one time is known as degree of a relation. Q: Total number of columns that comprise a relation is known as cardinality of the relation. R: Restrictions can be applied on the values of attributes.

  1. Both P and Q

  2. R only

  3. Both P and R

  4. All of these

  5. None of these

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

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