CBSE Class 12 Computer Science (083) Syllabus 2026-27

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Download the official CBSE syllabus

This is CBSE's own Senior Secondary Curriculum 2026-27 (see the Class 12 Computer Science section), straight from cbseacademic.nic.in:

Official CBSE Curriculum 2026-27 (PDF)

Want a term-wise study plan mapped to this syllabus? Book a free demo with Kajal Ma'am.

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Marks at a glance

100 marks total = 70 theory (3-hour written exam) + 30 practical (lab test, practical file, project and viva).

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Unit-wise syllabus & marks

Unit & topics	Marks
Unit 1: Computational Thinking and Programming – 2 Revision of Class XI Python topics. Functions: types (built-in, module, user-defined), creating user-defined functions, arguments and parameters, default and positional parameters, functions returning value(s), flow of execution, scope of a variable (global, local). Exception Handling using try-except-finally blocks. Files: introduction, types (text, binary, CSV), relative and absolute paths. Text	40
Unit 2: Computer Networks Evolution of networking (ARPANET, NSFNET, INTERNET). Data communication terminologies: components (sender, receiver, message, media, protocols), bandwidth, data transfer rate, IP address, switching techniques (circuit, packet). Transmission media: wired (twisted pair, co-axial, fiber-optic), wireless (radio, micro, infrared waves). Network devices (Modem, Ethernet card, RJ45, Repeater, Hub, Switch	10
Unit 3: Database Management Database concepts and need. Relational data model: relation, attribute, tuple, domain, degree, cardinality, keys (candidate, primary, alternate, foreign). Structured Query Language: DDL and DML, data types (char, varchar, int, float, date), constraints (not null, unique, primary key), create/use/show/drop database, create/describe/alter/drop table, insert, delete, select, operators (mathematical,	20
Theory total	70

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Practical (30 marks)

Component	Marks
Lab Test — Python program (60% logic + 20% documentation + 20% code quality)	8
Lab Test — SQL queries (4 queries based on one or two tables)	4
Report file (min 15 Python programs; min 5 SQL query sets; min 4 Python-SQL connectivity programs)	7
Project (using concepts of Classes 11 and 12)	8
Viva voce	3

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Related free resources

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Common questions

What is the CBSE Class 12 Computer Science (083) syllabus for 2026-27?+

The 2026-27 syllabus has Unit 1: Computational Thinking and Programming – 2 (40 marks), Unit 2: Computer Networks (10 marks), Unit 3: Database Management (20 marks), totalling 70 theory marks, plus a 30-mark practical.

How many marks are theory and practical in Class 12 Computer Science?+

Class 12 Computer Science (083) is 100 marks: 70 marks theory (3-hour written exam) and 30 marks practical (lab test, practical file, project and viva).

Which unit carries the most marks in Class 12 Computer Science?+

Unit 1: Computational Thinking and Programming – 2 carries the most, 40 of 70 theory marks.

Where can I download the official CBSE Class 12 Computer Science syllabus 2026-27?+

CBSE publishes it in the Senior Secondary Curriculum 2026-27 on cbseacademic.nic.in; the official PDF is linked at the top of this page.

CBSE Class 12 Computer Science Syllabus 2026-27