Although my rank is not so fancy but still GATEOverflow helped me a lot in getting good marks in GATE.It is best source for cracking GATE with good marks. This is a place where you get a lot of questions in addition to previous year questions posted by students from all over the country. You can see the answers are well elaborated,nicely explained and by this way you will also come to know what is the quality of students sitting with you on the exam day.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 the 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 a MUST.
Gatecse is best source of study material. 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.One should avoid studying local books as they are not even subset of standard books. One must always study from standard books. Moreover, I would suggest to prepare Mathematics well even though GATE CS has other stuffs, as Mathematics is the subject which if you study well then you have an edge over others who study other subjects and give lesser importance to Maths and it also carries a major portion of marks.Maths is the subject which you not only need for GATE but you will need it for the whole life in whatever you do.
I want to thank founder of this website Arjun Suresh, for helping me and all the aspirants of GATE who look for coaching materials or other materials available in market as this is the only site which you one must follow whole heartedly for succeeding in GATE. Keep doing good work and wishing all future aspirants good luck :)