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From the following instance of a relation scheme R (A, B, C), we can conclude that :
  • a)
    A functionally determines B and B function­ally determines C
  • b)
    A functionally determines B and B does not functionally determine C
  • c)
    B does not functionally determine C
  • d)
    A does not functionally determine B and B does not functionally determine C
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
From the following instance of a relation scheme R (A, B, C), we can c...
Generally Normalization is done on the schema itself. From the relational instance given,we may strike out FD s that do not hold. e.g.B does not functionally determine C(This is true). But we cannot say that A functionally determines B for the entire relation itself. This is because that, A->B holds for this instance, but in future there might be some tuples added to the instance that may violate A->B. So overall on the relation we cannot conclude that A->B, from the relational instance which is just a subset of an entire relation.
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From the following instance of a relation scheme R (A, B, C), we can conclude that :a)A functionally determines B and B function­ally determines Cb)A functionally determines B and B does not functionally determine Cc)B does not functionally determine Cd)A does not functionally determine B and B does not functionally determine CCorrect answer is option 'C'. Can you explain this answer?
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From the following instance of a relation scheme R (A, B, C), we can conclude that :a)A functionally determines B and B function­ally determines Cb)A functionally determines B and B does not functionally determine Cc)B does not functionally determine Cd)A does not functionally determine B and B does not functionally determine CCorrect answer is option 'C'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about From the following instance of a relation scheme R (A, B, C), we can conclude that :a)A functionally determines B and B function­ally determines Cb)A functionally determines B and B does not functionally determine Cc)B does not functionally determine Cd)A does not functionally determine B and B does not functionally determine CCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for From the following instance of a relation scheme R (A, B, C), we can conclude that :a)A functionally determines B and B function­ally determines Cb)A functionally determines B and B does not functionally determine Cc)B does not functionally determine Cd)A does not functionally determine B and B does not functionally determine CCorrect answer is option 'C'. Can you explain this answer?.
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