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DC
Question Practice

What happens if an attribute defined as a primary key contains null values?

Attempt the question, check the explanation, and continue with similar questions to build confidence before exams.

MCQ_SA
CBSE
Class 11
Informatics Practices
Informatics Practices
Database Concepts
Question Bank

What happens if an attribute d...

Single Answer MCQ
Q-00067680

What happens if an attribute defined as a primary key contains null values?

1

The relation remains valid

2

The primary key loses its uniqueness

3

The relation is corrupted

4

No effect on the database

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