• Engineering mathematics
• Digital logic
• Computer organisation and architecture.
• Programming and Data structure.
• Algorithms.
• Theory of computation.
• Compiler design.
• Operating system.
• Database.
• Computer networks.

Hello Aditya

GATE with CSE topics consist of 4 topics which is-

1. Discrete Mathematics- It consist of topics such as Propositional and first-order logic. Sets, relations, functions, partial orders and lattices. Groups. Graphs: connectivity, matching, colouring. Combinatorics: counting, recurrence relations, generating functions.
2. Linear Algebra- It consist of topics related to Matrices, determinants, system of linear equations, eigenvalues and eigenvectors, LU decomposition.
3. Calculus - Topics are- Limits, continuity and differentiability. Maxima and minima. Mean value theorem. Integration.
4. Probability - In which topics come like random variables. Uniform, normal, exponential, poisson and binomial distributions. Mean, median, mode and standard deviation. Conditional probability and Bayes theorem.

You can check more information about the exam here https://engineering.careers360.com/articles/gate-syllabus-for-computer-science-and-information-technology

I Hope This Helps

Best Of Luck!!!