CBSE Class 12 Syllabus 2027 Computer Science

FOR CBSE CLASS 12 SYLLABUS EXAM PREPARATION

CBSE Class 12 Syllabus
2027
Question Paper ·
Computer Science
EXAM YEAR TYPE SUBJECT

CBSE Class 12 Syllabus 2027 Question Paper Computer Science

Notes · Sample Papers · Previous Year Papers · Mock Tests

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COMPUTER SCIENCE
Subject Code – 083
Class XII (2025-26)

1. Prerequisites
Computer Science- Class XI

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2. Learning Outcomes
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Student should be.cable em
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a) apply the concept
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b) explain
c) use basic data structure: Stacks
d) explain basics of computer networks.
e) use Database concepts, SQL along with connectivity between Python and SQL.

3. Distribution of Marks:

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Unit No. Unit Name
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Computational Thinking and
1 40
Programming – 2

2 Computer Networks 10

3 Database Management 20
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Total

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4. Unit wise Syllabus
Unit 1: Computational Thinking and Programming – 2
● Revision of Python topics covered in Class XI.
● Functions: types of function (built-in functions, functions defined in module, user
defined functions), creating user defined function, 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
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● Introduction to files, types of files (Text file, Binary file, CSV file), relative
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and absolute paths
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● 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 2: 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, Fiber-optic cable), Wireless media (Radio waves, Micro waves, 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 3: 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

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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

5. Practical

Marks
S.No Unit Name
(Total=30)

Lab Test:
1 1. Python program (60% logic + 20% 8
documentation + 20% code quality)

2. SQL queries (4 queries based on one
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or two tables)

Report file:
 Minimum 15 Python programs.
 SQL Queries – Minimum 5 sets using
2 7
one table / two tables.
 Minimum 4 programs based on
Python – SQL connectivity

Project (using concepts learnt in Classes 11
3 8
and 12)

4 Viva voce 3

6. Suggested Practical List:

Python Programming

● Read a text file line by line and display each word separated by a #.
● Read a text file and display the number of vowels/consonants/uppercase/lowercase
characters in the file.
● Remove all the lines that contain the character 'a' in a file and write it to another
file.
● Create a binary file with name and roll number. Search for a given roll number and
display the name, if not found display appropriate message.
● Create a binary file with roll number, name and marks. Input a roll number and
update the marks.
● Write a random number generator that generates random numbers between 1 and
6 (simulates a dice).
● Write a Python program to implement a stack using list.
● Create a CSV file by entering user-id and password, read and search the password
for given userid.

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● Create a student table and insert data. Implement the following SQL commands on
the student table:
o ALTER table to add new attributes / modify data type / drop attribute
o UPDATE table to modify data
o ORDER By to display data in ascending / descending order
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o DELETE to remove tuple(s) . co
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o GROUP BY and find the min, max, sum, count and average
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● Similar exercise may be framed for other cases.
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● Integrate SQL with Python by importing suitable module.
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7. Suggested Reading Material

● NCERT Textbook for COMPUTER SCIENCE (Class XII)
● Support Materials on the CBSE website.

8. Project

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The aim of the class project is to create something that is tangible and useful using

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Python file handling/ Python-SQL connectivity. This should be done in groups of two to

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three students and should be started by students at least 6 months before the
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submission deadline. The aim here is to find a real world problem that is worthwhile to

agbusinesses and ask them about the problems that
Students are encouraged to visit local
they are facing. For example, if a business is finding it hard to create invoices for filing
GST claims, then students can do a project that takes the raw data (list of transactions),
groups the transactions by category, accounts for the GST tax rates, and creates
invoices in the appropriate format. Students can be extremely creative here. They can
use a wide variety of Python libraries to create user friendly applications such as games,
software for their school, software for their disabled fellow students, and mobile
applications, of course to do some of these projects, some additional learning is required;
this should be encouraged. Students should know how to teach themselves.
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c. o working on projects. Teachers should take necessary measuresseform.this.
issues

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