93. BCNF — example 2

DBMS Published 30 Sept 2026 Updated 30 Sept 2026 0 Views Verified

How is BCNF stricter than 3NF?

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Answer & Explanation

4 Answers

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Option A

BCNF removes primary keys.

Additional Explanation

This option is incorrect for the stated requirement.

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Option B

BCNF means no table can have foreign keys.

Additional Explanation

This option is incorrect for the stated requirement.

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Option C

In BCNF, every determinant of a non-trivial functional dependency must be a superkey.

Additional Explanation

Correct implementation. Prefer parameterized queries in application code, validate affected rows for UPDATE/DELETE, and use transactions for related writes.

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Option D

BCNF allows every determinant regardless of key status.

Additional Explanation

This option is incorrect for the stated requirement.