The relational scheme R (A, B, C, D) and the functional dependencies A B are given; B C Which of the following alternatives is correct?

Select one or more: a. A C b. ACD B c. AC B d. AD BC e. A BC

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Given the relational scheme R (A, B, C, D) and the functional dependence A BC Which of the following alternatives is correct?

Select one or more: a. AD BC b. A B c. A D d. B C e. AC B

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Given the relational scheme R (A, B, C) and the functional dependence A B. Which of the following alternatives is wrong?

Select one or more: a. B B b. A BC c. B A d. AC B e. B C

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The relational scheme R (A, B, C, D) and the functional dependencies A B are given; A C Which of the following functional dependencies is incorrect?

Select one or more: a. AB B b. BC A c. A BC d. AD B e. A BCD

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Consider the following instance of relation R (A, B, C)

Which of the following functional dependencies stands?

Select one or more: a. B C b. A B c. A C d. B A e. C B f. C A

A B 2 4 4 4 1 3 3 6 4 3 7 8 10 1 9