Answer & Explanation

4 Answers
Verified Correct Answer

Option A

Non-key attributes should not depend transitively on a candidate key, subject to the formal 3NF definition.
Additional Explanation
Correct implementation. Prefer parameterized queries in application code, validate affected rows for UPDATE/DELETE, and use transactions for related writes.
Sarkari Resultess
Editorial Answer 1
Verified

Option B

All values must be duplicated.
Additional Explanation
This option is incorrect for the stated requirement.
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Editorial Answer 2
Verified

Option C

Every table must have exactly one index.
Additional Explanation
This option is incorrect for the stated requirement.
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Editorial Answer 3
Verified

Option D

Every table must have three columns.
Additional Explanation
This option is incorrect for the stated requirement.
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Editorial Answer 4