Computer Science Syllabus

CBSE Class XII Computer Science (083) syllabus 2026-27 at a glance

Subject code 083 · Class XII · Session 2026-27. The course carries 100 marks: a 70-mark theory paper and 30 marks of practical work. Prerequisite: Computer Science, Class XI.

Units and marks (theory)

Major topics

Unit 1: Computational Thinking and Programming - 2 (40 marks)

Revision of Class XI Python; functions (types, arguments and parameters, return values, scope of variables); exception handling with try-except-finally; file handling: text files (open modes, read/write methods, seek and tell), binary files with pickle (dump and load), CSV files with the csv module; data structure: stack (push and pop) using a list.

Unit 2: Computer Networks (10 marks)

Evolution of networking (ARPANET, NSFNET, Internet); data communication terms (bandwidth, data transfer rate, IP address, circuit and packet switching); wired and wireless transmission media; network devices (modem, hub, switch, router, gateway and more); PAN, LAN, MAN, WAN; bus, star and tree topologies; protocols (HTTP, FTP, PPP, SMTP, TCP/IP, POP3, HTTPS, TELNET, VoIP); web services (WWW, HTML, XML, domain names, URL, web hosting).

Unit 3: Database Management (20 marks)

Database concepts; relational data model (relation, attribute, tuple, domain, degree, cardinality, candidate/primary/alternate/foreign keys); SQL: DDL and DML, data types, constraints, CREATE/ALTER/DROP, INSERT/UPDATE/DELETE, SELECT with WHERE, IN, BETWEEN, LIKE, ORDER BY, NULL handling, aggregate functions, GROUP BY and HAVING, cartesian product, equi-join and natural join; Python-MySQL connectivity (connect(), cursor(), execute(), commit(), fetchone(), fetchall(), rowcount).

Practical (30 marks)

Source: official CBSE Senior Secondary curriculum 2026-27 for Class XII Computer Science (083), published by CBSE on cbseacademic.nic.in. This summary is for quick reference; the official syllabus PDF shown above is the complete document.