GATE DA 2025 Set 1 — Question 16

MCQ+1 / -0.33MediumDependency PreservationNormalizationDatabase Management & WarehousingJoin & DivisionRelational Algebra

Database Management & Warehousing → Normalization → Dependency Preservation

Last updated 5 September 2026

Question

If a relational decomposition is not dependency-preserving, which one of the following relational operators will be executed more frequently in order to maintain the dependencies?

Correct answer (C) Join Solution If a decomposition is not dependency-preserving, checking whether an update satisfies the functional dependencies requires joining the decomposed relations to reconstruct the original relation (or a view of it) where the dependencies can be verified. Therefore, the Join operation will be executed more frequently. Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (C) Join Solution If a decomposition is not dependency-preserving, checking whether an update satisfies the functional dependencies requires joining the decomposed relations to reconstruct the original relation (or a view of it) where the dependencies can be verified. Therefore, the Join operation will be executed more frequently.

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