rc test series

Question

Consider the relation R with the following information (A,B,C,D) :-

A	B	C	D
a	b	z	1
e	b	r	1
a	d	z	1
e	d	r	1
a	f	z	2
e	f	r	2

find the total number of FD in above relation (ignore the self FD’s X->X,Y->Y,XY->X,XY->Y etc).

i am getting only 10, but it is wrong;

is there any faster and appropriate technique for this?

Comments

@Shaik Masthan 

sir is there any trick to find no. of super keys also like u showed for FDs

. if u have some image for that, then pls share!

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Everyone follows same method,

if you want check this, it may helpful ( pages are damaged, but you can get what there written )

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thanku so much for sharing!!