Gce Model Questions Vol1 2023 Computer Studies Question 36

Practice objective / multiple choice question 36 from the 2023 Gce Model Questions Vol1 Computer Studies examination.

Gce Model Questions Vol1 2023 Computer Studies Objective / Multiple Choice Hard Difficulty
Question 36 GCE_MODEL_QUESTIONS_VOL1 • 2023 • COMPUTER_STUDIES • objective

Relation R(A,B,C,D,E) has the functional dependencies: (A \rightarrow B), (BC \rightarrow D), (D \rightarrow E), (AC \rightarrow B D), and (E \rightarrow A). (a) List all candidate keys of R. (b) State the highest normal form that R currently satisfies. (c) Decompose R into a set of BCNF relations, showing the resulting relation schemas.

Answer Options

A. Candidate keys: AB, AD, EC, DC. Highest normal form: 2NF. BCNF decomposition: R1(A,B), R2(B,C), R3(D,E).
B. Candidate keys: AC, BD, EC, DF. Highest normal form: 3NF. BCNF decomposition: R1(A,B), R2(C,D), R3(D,E).
C. Candidate keys: AC, BC, EC, DE. Highest normal form: 4NF. BCNF decomposition: R1(A,B), R3(D,E), R4(A,D).
Correct Answer D. Candidate keys: AC, BC, EC, DC. Highest normal form: 3NF. BCNF decomposition: R1(A,B), R3(D,E), R4(A,C,D).
Correct Answer
D
Correct Option:
Candidate keys: AC, BC, EC, DC. Highest normal form: 3NF. BCNF decomposition: R1(A,B), R3(D,E), R4(A,C,D).

About This Question

This is Gce Model Questions Vol1 2023 Computer Studies Question 36. It is one of the objective questions from the 2023 Gce Model Questions Vol1 Computer Studies examination.

Difficulty level: Hard .

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