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CBSE 2026-27

Computer Science Notes

These Class 12 Computer Science notes are prepared strictly according to the CBSE 2026-27 syllabus. The notes cover all important chapters including Python Revision Tour, Working with Functions, File Handling, Exception Handling, Data Structure, Computer Network, MySQL Database and Interface Python with MySQL . Each chapter is explained in a simple, exam-oriented manner with examples, definitions, and key points to help students score better in board exams. These notes are useful for revision, self-study, and last-minute preparation.

Class 12 CS Class 12 IP Class 11 CS Class 11 IP
Unit 1 : Chapter 1

🐍 Python Revision Tour I

Revise Python basics, variables, data types, operators and input/output with quick board-focused examples. Perfect for last-minute revision.

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Unit 1 : Chapter 2

🐍 Python Revision Tour II

Master strings, lists, tuples, dictionaries and sorting techniques with exam-oriented questions and revision notes.

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Unit 1 : Chapter 3

⚙️ Working with Python Function

Learn functions, scope, LEGB rule, arguments and modules with easy examples frequently asked in CBSE board exams.

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Unit 1 : Chapter 4

⚡ Exception Handling

Master try-except-finally, custom exceptions and error handling with practical programs for board exams and practical viva.

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Unit 1 : Chapter 5A

🗂️ File Handling in Python (Text File)

Understand text file operations, read(), write(), append(), file modes and important CBSE practical programs.

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Unit 1 : Chapter 5B

🔐 File Handling in Python (Binary & CSV file)

Learn binary files, CSV handling, pickling and serialization with practical coding examples for Class 12 Computer Science.

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Unit 1 : Chapter 6

📦 Data Structures (Stack)

Understand Stack, Push, Pop and LIFO with Python implementation, flowcharts and important board questions.

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Unit 2 : Chapter 7

🌐 Computer Networks-I

Master the fundamentals of Computer Networks. Covers network types (LAN, MAN, WAN), topologies (Star, Bus, Tree), transmission media (guided/unguided, Fibre Optic), and switching techniques (Packet vs. Circuit). Includes complete guides to MAC/IP addressing, IPv4 vs. IPv6, DNS, and essential board exam tips.

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Unit 2 : Chapter 8

🖧 Computer Networks-II

Master networking devices, protocols, IP addressing, switching and routing with CBSE exam-focused explanations.

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Unit 3 : Chapter 9

🛢️ Relational Databases

Master relational databases and DBMS concepts in this syllabus-aligned chapter. Learn essential database terminology like relation, tuple, domain, degree, and cardinality. Understand keys (Primary, Candidate, Alternate, Foreign) and start writing Data Definition Language (DDL) SQL commands like CREATE, ALTER, and DROP in MySQL to structure and manage database schemas efficiently for board exams.

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Unit 3 : Chapter 10

🔍 Simple Queries in SQL

Complete CBSE Class 12 SQL Notes covering MySQL queries, functions, WHERE clause, aggregate functions and important board exam questions.

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Unit 3 : Chapter 11

📅 Table Creation and Data Manipulation Commands

Master CREATE, ALTER, INSERT, UPDATE, DELETE and SQL Constraints with CBSE board examples and practical queries.

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Unit 3 : Chapter 12

🔗 Grouping Records, Joins in SQL

Master GROUP BY, HAVING clause, and SQL Joins with CBSE board examples. Learn to summarise grouped data using aggregate functions and combine data from multiple tables using Equi-Join and Natural Join.

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Unit 3 : Chapter 13

🔗 Interface Python with MySQL

Master Python-MySQL connectivity using mysql.connector. Learn to establish database connections, execute SELECT queries using fetchall() and fetchone(), perform INSERT and UPDATE operations with parameterised queries, and safely manage database transactions using commit() and rollback().

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🎯 CBSE BOARD EXAM 2027

Complete Preparation Resources

Prepare smarter with the right combination of CSIP12's FREE digital resources + optional printed study books.

COMPUTER SCIENCE — 083

2026–27
LEARN — Core Theory
Sumita Arora — Progress in Computer Science with Python
Primary

2026–27 Session Edition • Dhanpat Rai & Co.

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Looking for an alternative?
Preeti Arora — Computer Science with Python • Sultan Chand & Sons

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PRACTISE — Competency & Board Questions
Oswaal Class 12 Computer Science Question Bank
Primary

Chapterwise & Topicwise | For 2027 Exam

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Additional Options
Together With CBSE Question Bank Class 12 CS View on Amazon
Arihant All in One Computer Science Class 12 View on Amazon

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