Computer Science
Class – XII (Code No.-083)
Syllabus: 2023-24
Distribution of Marks:
Unit No. |
Unit Name |
Marks |
Periods |
|
Theory |
Practical |
|||
I |
Computational
Thinking and Programming – 2 |
40 |
70 |
50 |
II |
Computer
Networks |
10 |
15 |
… |
III |
Database
Management |
20 |
25 |
20 |
|
|
70 |
110 |
70 |
Unit wise
Syllabus
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 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 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, 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
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
5. Practical
S.No. |
Unit Name |
Marks (Total=30) |
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: ·
Minimum
15 python Programs. ·
SQL
queries – Minimum 5 sets using one table/two table ·
Minimum
4programs based on python-SQL Connectivity |
7 |
3 |
Project (using concepts learnt in Classes 11 and 12) |
8 |
4 |
Viva Voce |
3 |
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.
Database
Management
●
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
o
DELETE to remove tuple(s)
o GROUP BY and find the min, max, sum, count and average
● Similar exercise may be
framed for other cases.
●
Integrate SQL with Python by importing suitable module.
7.
Suggested Reading Material
● NCERT Textbook for COMPUTER
SCIENCE (Class XII)
●
Support Materials on the CBSE website.
8.
Project
The
aim of the class project is to create something that is tangible and useful
using Python file handling/ Python-SQL connectivity. This should be done in
groups of two to three students and should be started by students at least 6
months before the submission deadline. The aim here is to find a real world
problem that is worthwhile to solve.
Students
are encouraged to visit local businesses and ask them about the problems that
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.
The students should be sensitized to avoid plagiarism and violations of copyright issues while working on projects. Teachers should take necessary measures for this.
* All the contents of this page are taken from CBSE website
(https://www.cbse.gov.in/)
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