book name is" test ur c aptitude"

Question

plzzz explain how this code is executed

Comments

if you follow this examples, i am sure you will get -ve marks easily...

Better to practice from Standard books or Geeks For Geeks ( its my opinion )

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whats wrong in this question bro its running well and giving output also question is question there is no tag with bad 

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Who told you that everything that runs is valid? Can you show any similar question in more than 30 previous year GATE papers? I do not know from where you picked such a book which still has conio.h

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Apart from PYQ'S, which resources should I refer for questions related to C programming ?