Curriculum for the Academic Year 2020-21 | CS CLASS XII | COMPUTER SCIENCE WITH PYTHON |CBSE-2020-21
Computer Science
CLASS-XII
Code No. 083
2020-21
1. Prerequisites
Computer Science- Class XI
2. Learning Outcomes
Apply the concept of functions and recursion.
Ability to create and use Python libraries.
Apply the concept of file handling.
Make use of the concept of efficiency in algorithms and computing in
general.
Ability to use basic data structures: Stacks and Queues.
Explain the basics of computer networks.
Ability to use connectivity between Python and SQL.
Unit No. Unit Name Theory Marks
I Computational Thinking and Programming - 2 40
II Computer Networks 10
III Database Management 20
Unit I: Computational Thinking and Programming - 2
● Revision of the basics of Python covered in Class XI.
● Functions: scope, parameter passing, mutable/immutable properties
of data objects, passing strings, lists, tuples, dictionaries to functions,
default parameters, positional parameters, return values, functions
using libraries: mathematical and string functions.
● File handling: Need for a data file, Types of file: Text files, Binary files
and CSV (Comma separated values) files.
Text File: Basic operations on a text file: Open (filename – absolute
or relative path, mode) / Close a text file, Reading and Manipulation
of data from a text file, Appending data into a text file, standard input /
output and error streams, relative and absolute paths.
● Binary File: Basic operations on a binary file: Open (filename –
absolute or relative path, mode) / Close a binary file, Pickle Module –
methods load and dump; Read, Write/Create, Search, Append and
Update operations in a binary file.
● CSV File: Import csv module, functions – Open / Close a csv file,
Read from a csv file and Write into a csv file using csv.reader ( ) and
csv.writerow( ).
● Using Python libraries: create and import Python libraries.
● Recursion: simple algorithms with recursion: print a message forever,
sum of first n natural numbers, factorial, Fibonacci numbers;
recursion on arrays: binary search.
● Idea of efficiency: performance measurement in terms of the number
of operations.
● Data-structures: Lists as covered in Class XI, Stacks – Push, Pop
using a list, Queues – Insert, Delete using a list.
Unit II: Computer Networks
● Evolution of Networking: ARPANET, Internet, Interspace Different
ways of sending data across the network with reference to switching
techniques (Circuit and Packet switching).
● Data Communication terminologies: Concept of Channel, Bandwidth
(Hz, KHz, MHz) and Data transfer rate (bps, Kbps, Mbps, Gbps,
Tbps).
● Transmission media: Twisted pair cable, coaxial cable, optical fiber,
infrared, radio link, microwave link and satellite link.
● Network devices: Modem, RJ45 connector, Ethernet Card, Router,
Switch, Gateway, WiFi card.
● Network Topologies and types: Bus, Star, Tree, PAN, LAN, WAN,
MAN.
● Network Protocol: TCP/IP, File Transfer Protocol (FTP), PPP, HTTP,
SMTP, POP3, Remote Login (Telnet) and Internet, Wireless / Mobile
Communication protocol such as GSM, GPRS and WLL.
● Mobile Telecommunication Technologies: 1G, 2G, 3G, 4G and 5G;
Mobile processors;
Electronic mail protocols such as SMTP, POP3, Protocols for Chat
and Video Conferencing: VoIP, Wireless technologies such as Wi-Fi
and WiMax
● Network Security Concepts:
Threats and prevention from Viruses, Worms, Trojan horse, Spams
Use of Cookies, Protection using Firewall, https;
India IT Act, Cyber Law, Cyber Crimes, IPR issues, hacking.
● Introduction To Web services: WWW, Hyper Text Markup Language
(HTML), Extensible Markup Language (XML); Hyper Text Transfer
Protocol (HTTP); Domain Names; URL; Website, Web browser, Web
Servers; Web Hosting, Web Scripting – Client side (VB Script, Java
Script, PHP) and Server side (ASP, JSP, PHP), Web 2.0 (for social
networking)
● E-commerce payment transactions using online banking, mobile
banking, payment apps and services.
Unit III: Database Management
Database Concepts: Introduction to database concepts and its
need.
Relational data model: Concept of domain, relation, tuple, attribute,
degree, cardinality, key, primary key, candidate key, alternate key
and foreign key;
Structured Query Language:
General Concepts: Advantages of using SQL, Data Definition
Language and Data Manipulation Language;
Data Types: number / decimal, character / varchar / varchar2, date;
SQL commands: CREATE TABLE, DROP TABLE, ALTER
TABLE, UPDATE ....SET...., INSERT, DELETE; SELECT,
DISTINCT, FROM, WHERE, IN, BETWEEN, LIKE, NULL / IS
NULL, ORDER BY,GROUP BY, HAVING;
SQL functions: SUM ( ), AVG ( ), COUNT ( ), MAX ( ) and MIN ( );
Joins: equi-join and natural join
Interface of Python with an SQL database
Connecting SQL with Python
Creating Database connectivity Applications