CBSE 11 COMPUTER SCIENCE

This course covers the entite syllabus of grade 11 (Python) and Grade 12 portion. After the completion of syllabus through board paper discussion is done and startegies are discussed to do well in Exam. 

Computer Science 
CLASS XII Code No. 083

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
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 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 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