Neco 2022 Computer Studies Question 48

Practice objective / multiple choice question 48 from the 2022 Neco Computer Studies examination.

Neco 2022 Computer Studies Objective / Multiple Choice Hard Difficulty
Question 48 NECO • 2022 • COMPUTER_STUDIES • objective

Consider a relation \(R(A,B,C,D)\) with functional dependencies \(A \rightarrow B\), \(B \rightarrow C\), and \(C \rightarrow D\). Decompose \(R\) into a set of relations that are in Boyce‑Codd Normal Form (BCNF). State the resulting relations and indicate whether the decomposition is lossless‑join and whether it preserves all functional dependencies.

Answer Options

A. R1(A,B), R2(B,C), R3(C,D); lossless‑join: Yes; dependency preservation: No
Correct Answer B. R1(A,B), R2(B,C), R3(C,D); lossless‑join: Yes; dependency preservation: Yes
C. R1(A,B), R2(A,C), R3(C,D); lossless‑join: Yes; dependency preservation: Yes
D. R1(A,B), R2(B,C), R3(C,D); lossless‑join: No; dependency preservation: Yes
Correct Answer
B
Correct Option:
R1(A,B), R2(B,C), R3(C,D); lossless‑join: Yes; dependency preservation: Yes

About This Question

This is Neco 2022 Computer Studies Question 48. It is one of the objective questions from the 2022 Neco Computer Studies examination.

Difficulty level: Hard .

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