CBSE Class 12 Computer Science Weightage 2026 Unit and Chapter-Wise Marks Distribution

CBSE Class 12 Computer Science Weightage 2026 : The CBSE 12th Computer Science exam is divided into a 70-mark theory paper and a 30-mark practical examination, making a total of 100 marks. The theory exam is divided into 3 main units: Computational Thinking and Programming-2 worth 40 marks, Computer Networks of 10 marks, and Database Management of 20 marks. The weightage for the practical exam comprises a Lab Test of 12 marks, Report File and Viva  of 10 marks, and a Project of 8 marks.

The Central Board of Secondary Education has implemented some changes in CBSE Class 12 Computer Science Exam Pattern 2026 . There will be more competency-based questions, with a significant portion being case-based and source-based, assessing conceptual understanding rather than memorization. There will be 50% competency-based questions, with a significant emphasis on MCQs, case-based, and source-based questions. Remaining 20% and 30% will be MCQs and constructed response questions, which will include short-answer and long-answer questions. Read the complete article to know more on the CBSE Class 12 Computer Science 2026 Unit and Chapter-Wise Marks Distribution.

CBSE Class 12 Computer Science Weightage 2026 Theory Exam - Chapter Wise

Refer to the table below to have an idea of the unit-wise CBSE Class 12 Computer Science Weightage 2026 for the theory exam:

Unit Number	Unit Name	Chapters	Marks
1	Computational Thinking and Programming – 2	Python Basics (data types, operators, control structures like if, loops): High weight Debugging, Modules (syntax, logical errors, math, random, statistics modules) Data Structures (Lists, Tuples, Dictionaries) Strings (operations like concatenation, slicing) Functions (built-in, user-defined, scope of variables) Exception Handling (try-except-finally) File Handling (text, binary, CSV files) Stack data structure and operations (push, pop, implemented using lists)	40
2	Computer Networks	Evolution of Networking (ARPANET, INTERNET) Data Communication Concepts (sender, receiver, protocols, bandwidth) Transmission Media (twisted pair, coaxial, fiber optics; wireless media) Network Devices (modem, switches, routers) Network Topologies (bus, star, tree) Network Types (PAN, LAN, MAN, WAN) Network Protocols (HTTP, FTP, TCP/IP, SMTP, etc.) Introduction to Web Services (WWW, URLs, web browsers, web hosting)	10
3	Database Management	Database Concepts and Importance Relational Data Model (relations, attributes, keys) SQL (DDL and DML operations - create, insert, update, delete, select queries) SQL Clauses (where, order by, group by, having) SQL Joins (Cartesian product, equi-join, natural join) Python Interface with SQL (connecting, executing queries, commit, fetch)	20
Total			70

Read More CBSE Class 12 Computer Science Sample Paper 2026

CBSE Class 12 Computer Science Weightage 2026 Practical Exam

You can go through the unit-wise CBSE Class 12 Computer Science Weightage 2026 for the practical exam from the table given below:

S.No	Unit Name	Marks
1	Lab Test:	-
	1. Python program (60% logic + 20% documentation + 20% code quality)	8
	2. SQL queries (4 queries based on one or two tables)	4
2	Report file:	-
	1. Minimum 15 Python programs.	-
	2. SQL Queries – Minimum 5 sets using one table / two tables.	-
	3. Minimum 4 programs based on Python – SQL connectivity	7
3	Project (using concepts learnt in Classes 11 and 12)	8
4	Viva voce	3
-	Total	30

Read More CBSE Class 12 Computer Science Syllabus 2026

CBSE Class 12 Computer Science Question Paper Blueprint 2026

The CBSE Class 12 Computer Science question paper has 5 sections (A, B, C, and D). A total of 37 questions will be there in the question paper and the maximum marks will be 70 marks. The question paper consists of MCQs, very short answer type, short answer type, and long answer questions. All programming questions are to be answered using the Python Language only.

Section	Type of Questions	Question Numbers	Marks per Question	Total Marks
A	Multiple Choice questions	1 to 21	1 mark each	21
B	Very short answer questions	22 to 28	2 marks each	14
C	Short answer questions type-1	29 to 31	3 marks each	9
D	Short answer questions type-2	32 to 35	4 marks each	16
E	Long answer questions	36 to 37	5 marks each	10
Total	-	1 to 37		70

The CBSE Class 12 Computer Science exam 2026 is designed to evaluate your understanding and skills in key areas such as programming, computer networks, and database management. You must cover all the units and chapters and avoid doing suggestive study to score well in the exam. In practice, write python programs that implement data structures and file handling, and execute SQL queries accurately.