Computer Science Class 12 Notes

Teachers and Examiners (CBSESkillEduction) collaborated to create the Computer Science Class 12 Notes. All the important Information are taken from the NCERT Textbook Computer Science (083) class 12.

Computer Science Class 12 Notes

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)
• 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 csv.writer() and read
  from a csv file using csv.reader( )
• Data Structure: Stack, operations on stack (push & pop), implementation of stack using list.

Computer Science Class 12 Notes

1. Python Revision tour – 1 Class 12 Notes
2. Python Revision tour – 2 Class 12 Notes Notes
3. Working with Functions Class 12 Notes
4. Using Python Libraries Class 12 Notes
5. File Handling Class 12 Notes
6. Recursion Class 12 Notes
7. Idea of Algorithmic Efficiency Class 12 Notes
8. Data Visualization using Pyplot Class 12 Notes
9. Data Structure Class 12 Notes

Computer Science Class 12 MCQ

1. Python Revision tour – 1 Class 12 MCQs
2. Python Revision tour – 2 Class 12 MCQs
3. Working with Functions Class 12 MCQs
4. Using Python Libraries Class 12 MCQs
5. File Handling Class 12 MCQs
6. Recursion Class 12 MCQs
7. Data Visualization using Pyplot Class 12 MCQs
8. Data Structure Class 12 MCQs

Computer Science Class 12 Questions and Answers

1. Python Revision tour – 1 Class 12 Questions and Answers
2. Working with Functions Class 12 Questions and Answers
3. Using Python Libraries Class 12 Questions and Answers
4. File Handling Class 12 Questions and Answers
5. Recursion Class 12 Questions and Answers
6. Idea of Algorithmic Efficiency Class 12 Questions and Answers
7. Data Structure Class 12 Questions and Answers
8. More on MySQL Class 12 Questions and Answers

Unit II: Computer Networks (Computer Science Class 12 Notes)

• 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

1. Computer Network Class 12 Notes
2. Computer Network Class 12 MCQs
3. Computer Network Class 12 Questions and Answers

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 fetchone(), fetchall(), rowcount, creating
  database connectivity applications

1. More on MySQL Class 12 Notes
2. More on MySQL Class 12 MCQs
3. More on MySQL Class 12 Questions and Answers