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ISC Class 12 Computer Science: Chapter-wise Notes and PYQs

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ISC · Class 12 · 2026-27

ISC Class 12 Computer Science: chapter-wise study guide

All 14 chapters of ISC Class 12 Computer Science for the 2026-27 session. Each chapter page explains the ideas, gives tricks to remember them, shows where students lose marks, and links to practice.

  • 14 chapters
  • 24 topic pages
Start with the first chapter

Exam note: ISC Computer Science (868) has two papers: Paper 1 Theory (3 hours, 70 marks) set by CISCE on the Class XII syllabus below, and Paper 2 Practical (3 hours, 30 marks: a Java programming problem solved in a planning and an examination session, plus the year's programming assignments), evaluated by a Visiting Examiner and the teacher. Programs are written in Java. Class XI is examined by the school.

Section A

  1. Boolean Algebra

  2. Computer Hardware

Section B

  1. Implementation of Algorithms to Solve Problems

  2. Programming in Java (Review of Class XI Sections B and C)

  3. Objects

  4. Primitive Values, Wrapper Classes, Types and Casting

  5. Variables, Expressions

  6. Statements, Scope

  7. Methods

  8. Arrays, Strings

  9. Recursion

Section C

  1. Inheritance, Interfaces and Polymorphism

  2. Data Structures

  3. Complexity and Big O Notation

Syllabus source: CISCE ISC 2027 Computer Science (868) syllabus, CISCE ISC 2025 Computer Science Paper 1 specimen question paper and answer key