Theory of Computation (TOC) for GATE Last Updated : 21 Apr, 2025 Comments Improve Suggest changes Like Article Like Report Theory of Computation (TOC) is a key subject in the GATE CSE exam. Here's a complete tutorial on the Theory of Computation for the GATE CSE exam. Whether you're revising or starting fresh, this tutorial will help you prepare effectively.If you have less time to study topic-wise in detail, you may refer to - Theory of Computation Gate Previous Year Questions.IntroductionIntroduction of Theory of ComputationChomsky Hierarchy in TOCRegular Expressions and Finite AutomataIntroduction to Finite Automata (FA)Design Finite Automata from Regular ExpressionsGenerating Regular Expressions from Finite AutomataUnion Process in DFAConcatenation Process in DFAMinimization of DFAConversion from NFA to DFANFA with Epsilon to DFA ConversionRegular Expression, Regular Grammar and Regular LanguagesHow to Write Regular ExpressionsIdentification of Regular LanguageProperties of Regular LanguageClosure Properties of Regular LanguageArden's Theorem in TOCMealy and Moore MachineContext-Free Grammar (CFG) and Push Down Automata (PDA)Introduction to Grammar in TOCRegular GrammarContext Free GrammarAmbiguity in CFG and CFLSimplification of Context Free GrammarConverting CFG to CNF (Chomsky Normal Form)Converting CFG to GNF (Greibach Normal Form)Pumping Lemma in TOCChecking if Language is CFL or NotClosure Properties of Context Free LanguageContext Sensitive Grammar and Context Sensitive LanguageIntroduction to Push Down AutomataDifference Between DPDA and NPDAConstruction of PDATuring MachineRecursive and Recursive Enumerable LanguageTuring Machine in TOCConstruction of Turing MachineHalting Problem in TOCDecidabilityDecidability and Undecidability in TOCUndecidability and Reducibility in TOCDecidability Table in TOCClosure Property Table in TOCClosure Properties Table in TOCOfficial Syllabus of Theory of Computation for GATE CSEHere's the complete syllabus of Theory of Computation, as per the GATE CSE 2025 official notification:Regular expressions and finite automata Context-free grammars and push-down automata Regular and context-free languages, pumping lemmaTuring machines and undecidabilityGATE CS/IT Subject-Wise WeightageThe subject-wise weightage for GATE CSE exam, based on the previous year patterns, is listed below:TopicsWeightageGeneral Aptitude15Engineering Mathematics13Discrete MathematicsDigital Logic6Computer Organization and Architecture8Programming and Data Structure15Algorithms7Theory of Computation6Compiler Design4Operating System9Databases7Computer Networks10Tips For Candidates While Preparing for TOC in GATE ExamsTo do well in the Theory of Computation section of the GATE exam, it's important to focus on key concepts and practice regularly. While the subject might seem tough at first, breaking it down into smaller, manageable parts can make it easier to understand. Understand the Basics First: Start by building a solid foundation of the fundamental concepts, such as automata theory, formal languages, and Turing machines. Without a clear understanding of these basics, advanced topics can become confusing.Focus on Important Topics: Some topics in Theory of Computation carry more weight in the GATE exam. Prioritize studying topics like finite automata, regular languages, context-free grammars, and Turing machines, as these are frequently tested.Practice Regularly: Solve as many practice problems and previous years’ question papers as possible. This will help you get familiar with the types of questions asked and improve your problem-solving speed.Revise Frequently: Theory of Computation requires frequent revision to retain all the concepts. Set aside dedicated time for revision to ensure you don’t forget important details.Understand the Proofs: Don’t just memorize theorems and proofs—understand them. Knowing why a theorem is true will help you tackle tricky problems more effectively.Take Mock Tests: Regularly take mock tests to simulate exam conditions. This will help you assess your preparation level and identify areas that need improvement.This tutorial provides a comprehensive yet straightforward guide to the core concepts of Theory of Computation as per the GATE CSE syllabus. By breaking down each topic and explaining it in simple terms, you'll be well on your way to mastering the subject and excelling in your exam. Comment More infoAdvertise with us Next Article Theory of Computation (TOC) for GATE K kartik Follow Improve Article Tags : GATE CS GATE Theory of Computation GATE 2025 Similar Reads Last Minute Notes - Theory of Computation The Theory of Computation (TOC) is a critical subject in the GATE Computer Science syllabus. It involves concepts like Finite Automata, Regular Expressions, Context-Free Grammars, and Turing Machines, which form the foundation of understanding computational problems and algorithms.This article provi 13 min read Theory of Computation - GATE CSE Previous Year Questions The Theory of Computation(TOC) subject has high importance in GATE CSE exam because:large number of questions nearly 6-8% of the total papersignificant weightage (6-8 marks) across multiple years Below is the table for previous four year mark distribution of TOC in GATE CS:YearApprox. Marks from TOC 2 min read Important Topics for GATE 2025 Computer Science For those aiming to excel in the GATE exam, enrolling in our comprehensive GATE course can provide a structured and thorough preparation plan. Our course covers all these important topics in depth, offering detailed explanations, practical examples, and numerous practice problems to ensure you are w 6 min read Computer Networks (CN) for GATE CSE Exam Here's the complete tutorial on Computer Networks for GATE CSE Exam. This tutorial will break down the syllabus topics into easy-to-understand sections. If you have less time to study topic wise in details, you may refer Computer Networks previous year questions topic wise.1. Introduction to Network 4 min read How to calculate GATE Exam Score To calculate your GATE score, the raw marks you obtain are normalized (if the exam is conducted in multiple sessions) to account for varying difficulty levels across sessions. This normalized mark is then converted into a GATE score out of 1000, reflecting your relative performance among all candida 4 min read Like