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Find the minimal set of FDs.
R(A, B, C, D)
F : { A -> B, C -> B, D -> ABC, AC -> D}
  • a)
    F : { A -> B, C -> B, D -> AB, AC -> D}
  • b)
    F : { A -> B, C -> B, D -> AC, AC -> D}
  • c)
    F : { A -> B, C -> B, D -> BC, AC -> D}
  • d)
    None
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Find the minimal set of FDs.R(A, B, C, D)F : { A -> B, C -> B, D...
C → B
A → B
AC → D
D → ABC
Given that, D → ABC
Case I:
B functionally dependent on  A so we replace
B to A
D → AAC
D → AC
Case II:
B functionally dependent on C, so we replace
B to C
D → ACC
D → AC
View all questions of this test
Most Upvoted Answer
Find the minimal set of FDs.R(A, B, C, D)F : { A -> B, C -> B, D...
C → B
A → B
AC → D
D → ABC
Given that, D → ABC
Case I:
B functionally dependent on  A so we replace
B to A
D → AAC
D → AC
Case II:
B functionally dependent on C, so we replace
B to C
D → ACC
D → AC
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Find the minimal set of FDs.R(A, B, C, D)F : { A -> B, C -> B, D -> ABC, AC -> D}a)F : { A -> B, C -> B, D -> AB, AC -> D}b)F : { A -> B, C -> B, D -> AC, AC -> D}c)F : { A -> B, C -> B, D -> BC, AC -> D}d)NoneCorrect answer is option 'B'. Can you explain this answer?
Question Description
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