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Discrete Structures & Theory of Logic (BCS303) AKTU exam strategy

Focus on Unit 3 (Theory of Logic) and Unit 1 (Set Theory, Relations, POSET & Lattices). Together they account for about 70 marks among all questions printed per paper. Unit 5 (Graphs & Combinatorics) is safest to skim if you're short on time.

Unit priority

  • Unit 3 (Theory of Logic) – Must Prepare, 38 marks avg. Unit 3 (Theory of Logic) averages 38 marks per paper — one of the heaviest units in this subject. Must-do: Propositional Logic, Theory of Inference, Predicate Logic.
  • Unit 1 (Set Theory, Relations, POSET & Lattices) – High Priority, 32 marks avg. Unit 1 (Set Theory, Relations, POSET & Lattices) averages 32 marks per paper — one of the heaviest units in this subject. Relations has appeared in every paper analysed — these are must-dos. Must-do: Relations, Lattices, Set Theory, POSET & Hasse Diagram.
  • Unit 2 (Functions & Boolean Algebra) – High Priority, 26 marks avg. Unit 2 (Functions & Boolean Algebra) averages 26 marks per paper — one of the heaviest units in this subject. Functions and Boolean Algebra have appeared in every paper analysed — these are must-dos. Must-do: Boolean Algebra, Functions.
  • Unit 4 (Algebraic Structures (Group Theory)) – Medium Priority, 26 marks avg. Unit 4 (Algebraic Structures (Group Theory)) averages 26 marks per paper — one of the heaviest units in this subject. Groups & Subgroups has appeared in every paper analysed — these are must-dos. Must-do: Groups & Subgroups, Rings & Fields, Cosets & Lagrange's Theorem.
  • Unit 5 (Graphs & Combinatorics) – Safe to Skim, 26 marks avg. Unit 5 (Graphs & Combinatorics) averages 26 marks per paper — one of the heaviest units in this subject. Graphs & Terminology has appeared in every paper analysed — these are must-dos. Must-do: Combinatorics & Counting, Graphs & Terminology, Isomorphism & Homeomorphism, Euler & Hamiltonian Paths.

Topics AKTU keeps repeating

  • Relations: Asked in 7 out of 7 papers. If you prepare only one topic from its unit, make it this one.
  • Functions: Asked in 7 out of 7 papers. If you prepare only one topic from its unit, make it this one.

Short on time?

  • Among all units, Unit 5 (Graphs & Combinatorics) is the lowest priority at 26M avg. If you're running low on time, prioritize the top 3 units and give this one a quick read. But even here — Graphs & Terminology, Combinatorics & Counting, Isomorphism & Homeomorphism are high-repeat topics. Cover these at minimum to stay safe.

How the paper is marked

  • Section A: 7 questions × 2 marks = 14 marks. Short definition/concept questions from all 5 units. Prepare 2–3 key definitions per unit — this section is the easiest 14 marks you can secure.
  • Section B: Attempt any 3 of 5 questions × 7 marks = 21 marks. Choose the 3 questions from units you've prepared most. Don't attempt all 5 — pick your strongest 3 and write them well.
  • Section C: 5 OR-pairs × 7 marks = 35 marks. One pair per unit — you must attempt all 5. This is where the exam is won or lost. Focus your deep preparation on the top 3 priority units.

Exam-day tips

  • Start with Section A to build momentum — budget 15–20 minutes max for all 7 questions.
  • In Section B, Unit 3 (Theory of Logic) questions have the highest repeat rate — always attempt that one first.
  • For Section C OR-pairs, read both options before choosing — sometimes the 'b' option is simpler despite appearing longer.
  • If you've prepared the VERY LIKELY topics, you can comfortably score 50+ marks without touching any new topic on exam day.
  • This strategy is built on 7 past papers — the patterns here are highly reliable.