Ace 2019

Question

Dependency preserving/Lossless ?

Comments

but using the standard method:

                     a                   b                    c                d      

abd               Y                   Y                    y                 Y

bc                                       Y                    Y

first row contains all Y's which indicates lossless, isn't this the standard method to check for lossless?

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I Don't know what you have done. What is this table? What is its use?

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C is right! common attribute should derive any one table, which in this case not followed! So, lossy.

Answer 1

the answer have to be C