CBSE Class 12 Computer Science Syllabus 2020-21| Check Latest Exam Pattern

CBSE has released Class 12 Computer Science Syllabus 2020-21 that will be knowing important topics for the purpose of examinations. Due to coronavirus pandemic, the board has reduced the syllabus. The question paper will be of 70 marks. Practical Work will be conducted of 30 marks.

CBSE Class 12 Computer Science Syllabus 2020-21

Unit No.
Unit Name
Marks
I
Computational Thinking and Programming – 2  
40
II
Computer Networks
10
III
Database Management
20

Total
70

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: Import Python libraries.
• Data-structures: Lists as covered in Class XI, Stacks – Push, Pop 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.

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 covered in class XI (2019-20)
• 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
- Performing Insert, Update, Delete queries
- Display data by using fetchone(),fetchall(),rowcount

Practical

Area
Marks 
4. Lab Test:
1. Python program (60% logic + 20% documentation + 20% code quality)
2. Small Python program that sends a SQL query to a database and displays the result. A stub program can be provided.
12
Report file: Minimum 20 Python programs. Out of this at least 4 programs should send SQL commands to a database and retrieve the result  7
Project (that uses the concepts that have been learnt in Class 11 and 12) 8
Viva Voce 3

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