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AI-assisted, automatically checked• Updated August 2026

DBMS Normalization MCQs

MCQs on 1NF, 2NF, 3NF, BCNF, functional dependencies, and lossless joins.

5 MCQsSubtopic of DBMSComputer ScienceAll Levels
Subtopic Focus & Conceptual Depth

Deep-dive into Normalization principles within DBMS. These targeted questions evaluate edge-cases, common pitfalls, and interview problem patterns.

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Focused Subtopic Mastery
Explanation Depth
Code Snippets & Analysis
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Campus Hiring & GATE CS

Normalization MCQ Questions

Page 1 of 1 (5 total)
Q1

What is the main requirement for a table to be in First Normal Form (1NF)?

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View Answer & Explanation
Correct Answer: Each column must hold atomic, indivisible values with no repeating groups
Explanation:
1NF is about eliminating multi-valued or repeating columns so that each cell contains a single value. This makes the data easier to query and update consistently.
Q2

What is data redundancy in a database, and why is it usually a problem?

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Correct Answer: It means the same piece of data is stored in multiple places, which can lead to inconsistencies
Explanation:
When the same fact is duplicated across rows or tables, an update in one place but not another leaves the data contradictory. Normalization is one common way to reduce this problem.
Q3

What issue does Boyce-Codd Normal Form (BCNF) address that 3NF does not fully cover?

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View Answer & Explanation
Correct Answer: Certain anomalies caused by overlapping candidate keys with functional dependencies not covered by 3NF
Explanation:
BCNF is a slightly stricter version of 3NF. A table can satisfy 3NF and still have update anomalies in rare cases involving multiple overlapping candidate keys, which BCNF is designed to catch.
Q4

A relation is in 2NF if it is in 1NF and contains no:

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View Answer & Explanation
Correct Answer: Partial dependency
Explanation:
Second Normal Form (2NF) requires that the table is in 1NF and has no partial functional dependencies (no non-prime attribute depends on a proper subset of a composite candidate key).
Q5

A relation is in Second Normal Form (2NF) if it is in 1NF and contains no:

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View Answer & Explanation
Correct Answer: Partial functional dependencies
Explanation:
2NF requires that all non-key attributes are fully functionally dependent on the primary key, eliminating partial dependencies.