Skip to content
Related Articles

Related Articles

Improve Article
Save Article
Like Article

UGC-NET | UGC NET CS 2016 July – II | Question 16

  • Last Updated : 20 Apr, 2018

In RDBMS, the constraint that no key attribute (column) may be NULL is referred to as:
(A) Referential integrity
(B) Multi-valued dependency
(C) Entity Integrity
(D) Functional dependency


Answer: (C)

Explanation:

  • In RDBMS, the constraint that no key attribute (column) may be NULL is referred to as Entity Interity
  • Referential integrity states that table relationships must always be consistent.
  • Multi-valued dependencyis a full constraint between two sets of attributes in a relation
  • Functional dependency is a relationship that exists when one attribute uniquely determines another attribute.

So, option (C) is correct.

Quiz of this Question

My Personal Notes arrow_drop_up
Recommended Articles
Page :

Start Your Coding Journey Now!