Gateoverflow is best source of previous year question and place to get your doubts solved. Answers on Gateoverflow are very nice and informative, they not only tell what answer is but also entire process how answer is derived and give total idea about that question. I found Gateoverflow very useful in my Gate preparation. Experts like Arjun Suresh, Praveen Saini and others are always present to solve any doubts an aspirant can get. Gateoverflow book of previous year questions along with answers is best study material anyone will need. Gateoverflow answer key this time was 99%+ correct. Overall I can say that If you are preparing for Gate computer Science , using Gateoverflow is MUST now.
Gatecse is best source of study material. I found great lectures of Shai Simpson and others there. I found best collection of books, links to various toppers blog and last years analysis.Gatecse is resource which any serious aspirant should know about.
I want to thank founder of this website Arjun suresh, for discussing with me regarding study strategy and many other issues related to GATE. Keep doing good work :)
AIR 28, Gate 2016