Name (Last, First): 7. The decomposition rule of inference tells us what? a) if
ID: 3709399 • Letter: N
Question
Name (Last, First): 7. The decomposition rule of inference tells us what? a) if A BC, then it is true that A-B and A-C. b) if AB-C, then it is true that A- C and B-C. c) if A- B and B-C, then it is true that A-c. d) if A-B and BX- C, then it is true that AX C 8. What is the name of the inference rule that allows this fact? IfA B and BX--C, then it is true that ??--c. a) transitivity b) pscudo-transitivity c) aggregation d) conditional adhesion 9. Consider a relation R(A, B, C) such that G: (A-B, AB C, AC-B) The minimum cover of set G is: a) (A-B, B->C) b) A-B, A->C) c) B-C, A->C) d) none of the above 10. For the relational schema R(A, B, C, D, FE, G), which of the following functional depenc an extraneous attribute on the LHS: fABC D; B E: C G: EG-Explanation / Answer
Q7
a- Decomposition
b-union
c- Transitivity
d- Pseudo Transitivity.
Q8-
Pseudo Transitivity.
Q9-
A->B ,A->C
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