City Guilds Model Questions Vol1 2022 Information Technology Question 47

Practice objective / multiple choice question 47 from the 2022 City Guilds Model Questions Vol1 Information Technology examination.

City Guilds Model Questions Vol1 2022 Information Technology Objective / Multiple Choice Hard Difficulty
Question 47 CITY_GUILDS_MODEL_QUESTIONS_VOL1 • 2022 • INFORMATION_TECHNOLOGY • objective

Consider a relation R(A,B,C,D,E) with functional dependencies: \(A \rightarrow B\), \(BC \rightarrow D\), \(D \rightarrow E\), \(E \rightarrow A\).\n\nDetermine (i) a minimal cover of the dependencies, (ii) all candidate keys of R, and (iii) the highest normal form (1NF, 2NF, 3NF or BCNF) that R satisfies.

Answer Options

A. Minimal cover: {A→B, BC→D, D→E, E→A}; Candidate keys: AB, CD; Highest normal form: 3NF
B. Minimal cover: {A→B, BC→D, D→E}; Candidate keys: AC, BD; Highest normal form: 2NF
C. Minimal cover: {A→B, B→C, D→E, E→A}; Candidate keys: AD, CE; Highest normal form: BCNF
Correct Answer D. Minimal cover: {A→B, BC→D, D→E, E→A}; Candidate keys: AC, BC, CE; Highest normal form: 1NF
Correct Answer
D
Correct Option:
Minimal cover: {A→B, BC→D, D→E, E→A}; Candidate keys: AC, BC, CE; Highest normal form: 1NF

About This Question

This is City Guilds Model Questions Vol1 2022 Information Technology Question 47. It is one of the objective questions from the 2022 City Guilds Model Questions Vol1 Information Technology examination.

Difficulty level: Hard .

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