Interview Question 20



Watch my YouTube video for explanation :



Please look into the class notes here for your references:


I/P
airport,from,to 
Mumbai,f1,f2             Mumbai,f2,f1 
Delhi,f1,f2              Delhi,f2,f1
Pune,f1,f2
Bangalore,f1,f2
Chennai,f1,f2 Chennai,f2,f1
Hyderabad,f1,f2
Pune,f2,f1
Delhi,f2,f1 Delhi,f1,f2
Chennai,f1,f3 Chennai,f3,f1


o/p
airport,from,to  (fields)
Mumbai,f1,f2
Delhi,f1,f2
Pune,f1,f2
Bangalore,f1,f2
Chennai,f1,f2
Hyderabad,f1,f2
Chennai,f1,f3

-->  input as is        ->      
INPUT -> Replicate(2) JOIN as Key(F1,F2,F3)  -> Collect Unused0,Output
   -->  suffled col 2 and 3 ->


Unused1 ----------------->
Gather  --->Final Output
Output-->Dedup on f1 ---->

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