CBSE Class 12 Computer Science Syllabus 2026-27: Download Syllabus PDF

Download CBSE 12th Computer Science Syllabus PDF 2026-27

CBSE Class 12 Computer Science Syllabus 2026-27 - Distribution of marks

CBSE Computer Science Class 12 Syllabus 2026-27 for Theory

Unit I: Computational Thinking and Programming – 2

• Revision of Python topics covered in Class XI.

• Functions: types of function (built-in functions, functions defined in a module, user-defined functions), creating user-defined functions, arguments and parameters, default parameters, positional parameters, function returning value(s), flow of execution, scope of a variable (global scope, local scope)

• Exception Handling: Introduction, handling exceptions using try-except-finally blocks.

• Introduction to files, types of files (Text file, Binary file, CSV file), relative and absolute paths.

• Text file: opening a text file, text file open modes (r, r+, w, w+, a, a+), closing a text file, opening a file using with clause, writing/appending data to a text file using write() and writelines(), reading from a text file using read(), readline() and readlines(), seek and tell methods, manipulation of data in a text file

• Binary file: basic operations on a binary file: open using file open modes (rb, rb+, wb, wb+, ab, ab+), close a binary file, import pickle module, dump() and load() method, read, write/create, search, append and update operations in a binary file

• CSV file: import csv module, open/close csv file, write into a csv file using writer(), writerow(), writerows() and read from a csv file using reader()

• Data Structure: Stack, operations on stack (push & pop), implementation of stack using list.

Unit II: Computer Networks

• Evolution of networking: introduction to computer networks, evolution of networking (ARPANET, NSFNET, INTERNET)

• Data communication terminologies: concept of communication, components of data communication (sender, receiver, message, communication media, protocols), measuring capacity of communication media (bandwidth, data transfer rate), IP address, switching techniques (Circuit switching, Packet switching)

• Transmission media: Wired communication media (Twisted pair cable, Co-axial cable, Fibre-optic cable), Wireless media (Radio waves, Microwaves, Infrared waves)

• Network devices (Modem, Ethernet card, RJ45, Repeater, Hub, Switch, Router, Gateway, WIFI card)

• Network topologies and Network types: types of networks (PAN, LAN, MAN, WAN), networking topologies (Bus, Star, Tree)

• Network protocol: HTTP, FTP, PPP, SMTP, TCP/IP, POP3, HTTPS, TELNET, VoIP

• Introduction to web services: WWW, Hyper Text Markup Language (HTML), Extensible Markup Language (XML), domain names, URL, website, web browser, web servers, web hosting

Unit III: Database Management

• Database concepts: introduction to database concepts and its need

• Relational data model: relation, attribute, tuple, domain, degree, cardinality, keys (candidate key, primary key, alternate key, foreign key)

• Structured Query Language: introduction, Data Definition Language and Data Manipulation Language, data type (char(n), varchar(n), int, float, date), constraints (not null, unique, primary key), create database, use database, show databases, drop database, show tables, create table, describe table, alter table (add and remove an attribute, add and remove primary key), drop table, insert, delete, select, operators (mathematical, relational and logical), aliasing, distinct clause, where clause, in, between, order by, meaning of null, is null, is not null, like, update command, delete command, aggregate functions (max, min, avg, sum, count), group by, having clause, joins: cartesian product on two tables, equi-join and natural join

• Interface of python with an SQL database: connecting SQL with Python, performing insert, update, delete queries using cursor, display data by using connect(), cursor(), execute(), commit(), fetchone(), fetchall(), rowcount, creating database connectivity applications, use of %s format specifier or format() to perform queries

CBSE Class 12 Computer Science Syllabus 2026-27 for Practicals

Prescribed Books for CBSE Class 12 Computer Science

CBSE Board prescribes NCERT Books for Class 12 to cover the Computer Science CBSE class 12 syllabus. The NCERT books are easily available, and students can understand all the topics quickly from the NCERT. Computer Science is a practical subject; hence, students must excel in the practicals as well. For this, students can refer to the practical books as prescribed.

How to download CBSE Class 12 Computer Science Syllabus 2026?

Follow the steps to download the Computer Science class 12 CBSE syllabus in PDF format.

• Step 1 - Visit the website cbseacademic.nic.in.
• Step 2 - Now click on the ‘Senior secondary curriculum (XI-XII)’
• Step 3 - Select the option of ‘Academic Electives - (Group-A)’ and then select the ‘Computer Science New XII’
• Step 4 - CBSE Class 12 Computer Science Syllabus 2026-27 will be available to download. Save the syllabus for further reference.

Preparation Tips for CBSE Class 12 Computer Science

• To prepare for computer science, students need to read the complete CBSE Class 12 Computer Science syllabus 2026-27 and check all the important topics.

• Read the standard books as prescribed by NCERT only. If required, then only refer to other books.

• Solve CBSE Class 12 question papers 2026-27, to check the examination pattern and marking scheme.

• Practice as much as you can. With regular practice, students can check their weak areas and work on them in the meantime.

• Attempt CBSE Class 12 sample papers 2026-27 to increase your speed and accuracy in the board examination.

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