Gateforum Test series

Question

Comments

lossless and dependency preserving.

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how this is dependency preserving please explain.

i'm getting not dependency preserving as C->A is not preserved.

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Ananya added my answer

Answer 1

$\left ( A,B \right )$ with FD's $A \rightarrow B $ and $B \rightarrow A$

$\left ( B, C \right )$ with FD's $B \rightarrow C $ and $C \rightarrow B$

$\left ( C, D \right )$ with FD's $C \rightarrow D $

$C \rightarrow A$ is preserved in relations $\left ( A,B \right )$ and $\left ( B,C \right )$

Hence lossless and dependency preserving

Comments

Thanku Mk Utkarsh sir.