The table below is prepared by our mentors after a thorough analysis of the last 20 previous year papers and come up with a plan to easily score 55+ marks in the GATE exam so that the aspirant following the schedule will get a chance in the top 20 premier universities.
Subject Name 
Weightage 
Chances of scoring in percentage% (assuming you dont do silly mistakes.) 
Topics 
Remarks 
TOC & CD 
1012 
90% 
All 
Tricky: Decidability and undecidability. 14 marks in GATE 2019 
DLD 
68 
90% 
All 
Counters (synchronous and asynchronous). In GATE 2019 7 marks in total and no question from counters. Most probable topics are : Logic gates, complement system, Boolean algebra(K  Map) 
Graph theory 
34 
90% 
All 

Group theory + Algebraic structures 
02 
100% 
All 

Recurrence relations and generating functions 
13 
80% 
All 

linear algebra 
23 
100% 
All 
This is the easy part of Engineering Maths, least effort and no tricky question. In GATE 2019 3 marks 
Aptitude 
69 
90% 
All 
If you wish to be in the top 100 this is a must, please don't neglect this. you need preparation. In GATE 2019 6 marks. 
Permutations, Combinatorics and Probability 
24 
70% 
All 
In GATE 2019 2 marks. 
Calculus 
13 
70% 
All 
In GATE 2019 1 marks. 
Mathematical Logic 
13 
55% 
All 
Easy to score but can be tricky. 
Data structures 
58 
85% 
ALL except Hashing 
Sometimes it can be tricky from Hashing. In GATE 2019 5 marks in total mostly covered from BST 
Algorithms 
811 
65% 
Easy topics: asymptotic notations, master theorem, sorting & searching, greedy( Huffman encoding, optimal merge pattern, graph traversals) 
Tricky: Rest of the topics 
Database 
69 
65% 
Easy: Transactions & Concurrency control protocols, FD's, Normalizations, File systems 
Tricky: SQL,RA, TRC, DRC, ERdiagram to Relation. There is a chance you can score more than the given percentage as questions asked in GATE are of medium level. In GATE 2019 8 marks in total. Two 2 marks questions from querying(RA, SQL). Rest of the questions are from FD, Concurrency and B,B+ trees. NOTE: Queries asked are bit easy to answer. 
Operating System 
89 
65% 
EASY: memory management, process scheduling, file management 
Tricky: Inter‐process communication, concurrency and synchronization, deadlocks can be tricky sometimes. In GATE 2019 8 marks in total. One question from demand paging, 2 from deadlock, 1 from process synchronization and 1 from disk scheduling. Out of them one difficult question from deadlock and one from synchronization. 
C Programming 
37 
60% 

Questions on pointers and arrays are confusing and there is chance of making silly mistakes. Recursion programming questions can be lengthy. In GATE 2019 11 marks in total. 4 marks on pointers , function calling ,array are difficult questions 
Computer Networks 
79 
60% 
Easy: Subnetting 
Tricky: Transport layer is tricky. In GATE 2019 7 marks. 
Computer Organization 
58 
50% 
Easy: Addressing Modes, Floating point Arithmetic, Memory management, pipelining 
Tricky: Interrupt handling. In GATE 2019 3 marks 
Try to start with Theory of Computation and Compiler Design. It has a lot of topics to be covered but are also very easy once you are clear with the concept. This particular subject has a weightage of around 1012 marks. Approximately 90% of this is easily scorable if you are clear with all the basic concepts. The only topic which seems to be very tricky in this subject is Decidability and Undecidability. This topic carries 12 marks. In GATE 2019 14 marks was the subject weightage.
The second most scoring subject is Digital Logic Design. The weightage of the same being 68 marks and 90% of it is easily scorable. The topic which seems to be tricky here is Synchronous and Asynchronous Counters. In GATE 2019 7 marks was covered from Digital Logic Design and the most probable topics here are Logic Gates, Complement System, Boolean Algebra (KMap).
Now after the completion of the above two subjects one can start with Engineering and Discrete Mathematics. As the syllabus is huge for the subject we recommend to break it into topics and study accordingly
Graph Theory is the most scoring among all having a weightage 34 marks and 90% of it easily scoring.
Followed by Group Theory and Algebraic Structures having 02 marks of weightage and is 100% scoring.
Then comes the Recurrence Relations and Generating Functions with 13 marks out of which 80% of them is scoring.
Linear Algebra is the easiest part of Engineering Mathematics and very less effort is required for the same. In GATE 2019 3 marks was there.
Before completion of the Engineering and Discrete Mathematics now first complete the Aptitude which students generally skip or keep it for the end. But it is very important as this is very scoring. 15 marks is fixed for Aptitude + English. For English there is nothing to learn as such, it will be totally dependent upon the students knowledge of English. So we will keep English aside for the time being and focus on Aptitude. The weightage for the same is 69 marks. 90% of it easily scorable.
If you wish to be in top 100 then preparation for Aptitude is also required, neglecting this will affect a lot. In Gate 2019 6 marks was from Aptitude.
Now after this again shift to Engineering and Discrete Mathematics.
Start with Permutation, Combinatorics and Probability which has a weightage of 24 marks. 70% is scorable as we have topics like Bayes Theorem and Combinatorics from where we can get some tricky questions. 2 marks was there in GATE 2019.
Followed by Calculus which has weightage of 13 marks. 70% of it is scorable. 1 mark question was there in GATE 2019.
Lastly cover Mathematical Logic having a weightage of 13 marks. 55% of it is scorable. It is easily scorable but it is very tricky at times. Tricky portion is First Order Logic.
After the completion of above start with Data Structures having 58 marks. 85% is very easy to score. All topics are easy except Hashing. In GATE 2019 5 marks is there and mostly it is from BST.
Algorithms is the next which has 811 marks. 65% of it is scorable easily. Easy topics are Asymptotic Notations, Master Theorem, Sorting and Searching, Greedy (Huffman Encoding, Optimal Merge Pattern, Graph Traversal). Except these all the others are tricky topics.
Database has a weightage of around 69 marks. 65% of it can be scored with ease. The easy topics are Transactions & Concurrency control protocols, FD's, Normalizations, File systems. The tricky topics are SQL,RA, TRC, DRC, ERdiagram to Relation. There is a chance you can score more than the given percentage as questions asked in GATE are of medium level. In GATE 2019 8 marks in total. Two 2 marks questions from querying(RA, SQL). Rest of the questions are from FD, Concurrency and B,B+ trees. NOTE: Queries asked are bit easy to answer.
Operating System is the next and the weightage for the same is 89 marks. 65% of it is scorable easily by covering the following easier topics: memory management, process scheduling, file management. The tricky topics are Inter‐process communication, concurrency and synchronization, deadlocks. In GATE 2019 we analysed that 8 marks in total. One question from demand paging, 2 from deadlock, 1 from process synchronization and 1 from disk scheduling. Out of them one difficult question from deadlock and one from synchronization.
CProgramming has 37 marks weightage. 60% of it is scorable. The tricky part is pointers and arrays. Recursion programming questions can be lengthy. In GATE 2019 11 marks in total.
In Computer Networks 79 marks is the weightage. 60% is scorable. Subnetting is considered to be very easy but basic should be very clear about that. Transport layer seems to be very tricky. 7 marks was covered in GATE 2019.
Computer Organization is the last subject with 58 marks weightage and only 50% of it is easy to score. The easy topics are Addressing Modes, Floating point Arithmetic, Memory management, pipelining and the tricky part is Interrupt Handling. In GATE 2019 3 marks was only there.