Just a point that before starting gate preparation one must know that tough and easy topics from the syllabus.
According to me most difficult to grab is COA(Comp. Organization and Arch.) and second is CN(Comp. Networks).
Most Easy and Scoring are Programming and Data Structures and TOC(Theory of computation).
My Personal Advise would be:- Even if you go to coaching , and have not studied COA in ur college or not done in depth,plz try to do COA beforehand(lots of free stuff can be found on youtube,or diff gate websites and coaching) , so that when you are tought in coaching your main focus is on understanding it more in depth and not just sitting there and all understanding nothing.When I did COA for the first time, though the lectures seemed as if i could do all the quetions easily , but when i starte to do PYQs, i literally gave up all hope, it was taking around 25-30 min each question to solve , in which i used to do 10 questions normally. So, I just did COA completely again and this time i got more in depth and finally ended up understanding it. COA is difficult to grab but once you grab it, it becomes most interesting subject.
Talking about CN, actually it is bit less difficult than COA, but super wide subject, with very very bug course. Just keep in mind , in coaching you will be taught all important parts , all which in 99.99% asked in gate, but that 0.01% in CN is actually again a very big part. IF u want to leave it u can as very rarely such questions are asked , but no one knows how rarely so better be prepared. Just find CN syllabus and match what you have studied and what is left. do those all.
Lastly , bit difficult is probability in Math, specially Random Variables. Try to not just mug the formula but understand how to apply those, as question may be confusing sometimes, which random variable to be used and which not.
Rest subject can be done easily, just keep good revision of all.(If u need how to revise I have already posted revision strategy post :)
one can start with easy subject , but not just go randomly but in connectivity, ie,
Programming, DS goes well with Algorithms.
TOC goes well with CD(Compiler Design).
Digital Logics(DL) goes well COA, and COA complements OS(Operating System)
DBMS and Discrete Maths
Aptitude goes with Discrete maths and probability from(Engg Maths)
Rest of Engg maths and CN usually goes unconnected .
All The Best !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
