CBSE Class 12 Computer Science Syllabus 2025-26
Official chapter-wise syllabus for CBSE Class 12 Computer Science — unit-wise marks distribution, list of deleted/reduced topics, and the 2025-26 exam paper pattern. Use this page alongside the Class 12 Computer Science preparation guide for full exam readiness.
2025-26
Academic Year
70
Theory Marks
30
Practical Marks
8
Total Chapters
Unit-Wise Marks Distribution
70 marks (theory)Unit 1: Computational Thinking and Programming – 2
Python Revision Tour · Exception Handling · File Handling · Data Structures — Stack · Data Structures — Queue
57% of theory marks
Unit 2: Computer Networks
Networking Concepts · Data Communication · Network Devices and Protocols · Wireless and Mobile Communication · Network Security
21% of theory marks
Unit 3: Database Management
Database Concepts and MySQL · Structured Query Language (SQL) · Python-MySQL Connectivity with mysql-connector
21% of theory marks
Chapter-Wise Syllabus
8 chapters| # | Chapter | Marks |
|---|---|---|
| 1 | Python Revision Tour | 5 |
| 2 | Exception Handling | 7 |
| 3 | File Handling | 12 |
| 4 | Data Structures: Stack | 8 |
| 5 | Data Structures: Queue | 8 |
| 6 | Computer Networks | 15 |
| 7 | Database Concepts & SQL | 10 |
| 8 | MySQL-Python Connectivity | 5 |
Deleted / Reduced Topics 2025-26
Note: The following topics have been deleted or reduced from the CBSE Class 12 Computer Science syllabus. Do not spend time studying these for the 2025-26 board exam. Always verify with the official CBSE syllabus document before your exam.
Communication Systems
Entire chapter removed — was part of Class 12 CS, now not tested in theory
Searching Algorithms
Linear Search and Binary Search — removed from 2023-24 rationalized syllabus
Artificial Intelligence
AI basic concepts — not part of CS board exam theory; covered in AI elective only
Cyber Ethics
Cyber safety and ethics chapter removed from board theory exam
Exam Paper Pattern 2025-26
70 marks total| Section | Marks/Q | Count | Total | |
|---|---|---|---|---|
| Section A | 1 | 25 | 25 | |
| Section B | 2 | 5 | 10 | |
| Section C | 3 | 5 | 15 | |
| Section D | 5 | 4 | 20 | |
| Total Theory Marks | 70 | |||
Practical / Internal Assessment Marks — assessed throughout the year by your school (projects, lab work, notebooks).
How to Use This Syllabus
Prioritise by marks
Use the unit-wise distribution above. Focus first on units with 20+ marks — they give the best return on study time.
Skip deleted topics
CBSE will not ask deleted topics in the board exam. Don't waste time on them — use that time for NCERT exercises instead.
Know the paper pattern
Section E (Case Study) has new-format questions many students ignore. Practise these separately — they're easy marks.
You know the syllabus. Now practise it.
ClearSteps gives you chapter-wise mock tests aligned to the exact CBSE Class 12 Computer Science syllabus, with AI evaluation against the official marking scheme.