CBSE Class 12 Board Exam Computer Science Syllabus and Weightage 2026

CBSE Class 12 Board Exam Computer Science Syllabus

Every student gearing up for the CBSE Class 12 Board Exam Computer Science Syllabus and Weightage 2026 needs a clear roadmap to crack this crucial examination with confidence. As the board exam approaches, understanding the syllabus, marking scheme, topic weightage, exam pattern, and preparation strategy becomes essential. In this comprehensive blog, we provide you with up-to-date, actionable insights based on the latest CBSE pattern for the 2026 exams, helping you prepare smartly and score high in Computer Science.

What Is the CBSE Class 12 Computer Science Exam?

The CBSE Class 12 Computer Science (Subject Code 083) board exam is a part of the science stream and combines both theory and practical evaluations. The subject tests your understanding of concepts such as programming in Python, data management (SQL), computer networks, and computational thinking — all of which are key to building a strong foundation for higher education in Computer Science, Engineering, and IT fields.

Exam Pattern: Theory and Practical Breakup

Total Marks and Duration

• Total Marks: 100

  • Theory Paper: 70 marks

  • Practical/Project: 30 marks

• Duration: 3 hours

• Board Exam Code: 083

The exam includes multiple sections that test different cognitive levels, from basic recall to application and analysis.

CBSE Class 12 Board Exam Computer Science Syllabus and Weightage 2026: Theory

Here’s how the theory section of the Computer Science exam is structured, along with unit-wise weightage:

Unit-Wise Marks Distribution (Theory – 70 Marks)

Unit	Unit Name	Marks
I	Computational Thinking & Programming – 2	40
II	Computer Networks	10
III	Database Management	20
	Total (Theory)	70

Important Note: The syllabus and weightage reflect the most recent structure followed by CBSE for the 2025-26 academic year. Students should prepare as per the prescribed syllabus released on the official CBSE academic portal and NCERT textbooks.

CBSE Class 12 Board Exam Computer Science Syllabus and Weightage 2026: Practical

The practical section tests hands-on skills and includes coding, SQL query writing, project work, documentation, and viva voce.

Practical Marks Distribution (30 Marks)

While exact task names vary slightly in terminologies across resource guides, the standard breakdown is as follows:

• Python Lab Test: ~7–8 marks

• SQL Queries: ~3–4 marks

• Report File: ~7 marks

• Project Work: ~8 marks

• Viva Voce (on Project/Report): ~2–3 marks

This practical evaluation ensures that students can implement real-world programming, test databases, and demonstrate both coding and analytical thinking skills.

Detailed Unit-Wise Topic Breakdown

Let’s break down the syllabus topics based on the latest patterns and common curriculum outlines.

Unit I: Computational Thinking & Programming – 2

• Recap of Python basics

• Functions: user-defined, parameters, return types

• Exception handling

• File handling (text, binary, CSV)

• Data structures (list, stack using lists)

• Python logic building and debugging

This unit carries the maximum weightage (40 marks) and forms the core of the theory paper.

Unit II: Computer Networks

• Networking fundamentals

• Types of networks (LAN, WAN, MAN)

• Protocols and models (TCP/IP basics)

• Network devices and internet concepts

Unit III: Database Management

• Basics of DBMS

• SQL commands and queries

• Table creation and manipulation

• Query optimisation basics

Marking Scheme and Question Types

CBSE emphasizes diverse question formats to assess different levels of understanding:

Sample Theory Paper Structure

Section	Question Type	Marks	No. of Questions
A	MCQs & Assertion-Reason	1 each	~21
B	Very Short Answer	2 each	~7
C	Short Answer	3 each	~3
D	Case-Study Based	4 each	~4
E	Long Answer	5 each	~2

The distribution ensures a balanced assessment of conceptual clarity, problem-solving skills, and analytical thinking.

Preparation Tips for CBSE Class 12 Computer Science

Achieving a strong performance in Computer Science requires both conceptual clarity and continuous practice. Based on expert advice and past student experiences, here are some effective strategies:

• Focus on Python programming fundamentals such as syntax, functions, file handling, and exceptions.

• Practice SQL queries regularly with different datasets.

• Solve past year question papers and sample papers to understand the pattern and improve time management.

• Write code on paper in addition to computer practice to prepare for board exam style practical and theory questions.

• Maintain neat and well-commented report files for practicals and projects to fetch better scores.

• Understand networking concepts through diagrams and real-life examples for better retention.

FAQ: CBSE Class 12 Board Exam Computer Science Syllabus and Weightage 2026

Q: What is the CBSE Class 12 Board Exam Computer Science Syllabus and Weightage 2026 for theory and practical?

A: The CBSE Class 12 Computer Science Syllabus and Weightage 2026 consists of a 70-mark theory paper covering Computational Thinking & Programming, Computer Networks, and Database Management, and a 30-mark practical section including Python programs, SQL queries, a report file, project work, and viva voce.

Q: How many total marks does the Computer Science board exam carry?

A: The total marks allotted for the CBSE Class 12 Computer Science exam in 2026 are 100: 70 for theory and 30 for practical.

Conclusion

The CBSE Class 12 Board Exam Computer Science Syllabus and Weightage 2026 demands structured preparation, deep conceptual understanding, and plenty of practice — both theoretical and practical. By mastering Python, SQL queries, networks, and system fundamentals, and aligning your study approach with the official exam pattern, you can significantly improve your performance.

Stay consistent with your study plan, practice past papers, and make sure your practical documentation is detailed and neat to secure strong marks in 2026.

Helpful Resources and Links

To help you prepare better and get access to official resources and sample papers, here are some useful links:

• Official CBSE Syllabus PDF: https://cbseacademic.nic.in

• NCERT Textbooks (Class 12 Computer Science): https://ncert.nic.in

• Sample Papers & Marking Scheme: Search “CBSE Class 12 Computer Science 083 sample paper 2026” on the official CBSE portal.