CBSE Class 11–12 · CS 083 · IP 065
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S = []
for word in ['a', 'bb', 'ccc']:
S.append(word)
print(len(S), S[-1])A real question from the Class 12 Computer Science output practice bank.
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Class 11 Computer Science Arnav Patro Scored 2 in Challenge: Strings + Tuples + Dictionary
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Magic FinderClass 11 & 12 · CS & IP
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Class 12 Computer Science (083)
15 chaptersThe CBSE course, chapter by chapter. Open a chapter to see its topics, then watch it, practise it and try its past board questions.
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01
Revision of Class XI Topics
Introduction & Execution Modes · Python Tokens & Variables · Data Types & Mutability · Arithmetic & Relational Operators · Logical, Assignment, Identity & Membership Operators · Expressions, Statements & Precedence · Input, Output & Type Conversion · Introduction to Control Flow & Indentation · if Statement · if-else Statement · if-elif-else Ladder (Multi-Way Selection) · Nested if Statements · The while Loop · The for Loop & range() · Jump Statements (Break & Continue) · Nested Loops · Suggested Practical Programs · Introduction & String Indexing · String Slicing · String Operations & Traversal · Built-in Methods (Case Conversion Methods) · Built-in Methods (Part-2) · Built-in Methods (Part-3) · Introduction & Creating Lists · List Operations & Traversal · Adding & Modifying Elements · Deleting Elements · Built-in Functions & Sorting · Searching & Counting · Nested Lists & Suggested Programs · Lists - Quick Summary · Introduction, Creation & Accessing · Tuple Operations & Traversal · Built-in Functions & Methods · Tuple Assignment & Nested Tuples · Suggested Programs (Algorithmic Logic) · Tuples - Summary · Introduction & Creation of Dictionary · Accessing & Modifying Data · Dictionary Methods (Part 1) · Accessors & View Objects · Traversal & Advanced Methods · Dictionary Suggested Programs · Dictionaries - Summary · Introduction & Import Syntax · The math Module · The random Module · The statistics Module · Modules - Summary
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02
Functions in Python
Revision: Python Foundations from Class XI · Introduction to Functions · Types of Functions · Creating User-Defined Functions & The Flow of Execution. · Arguments and Parameters · Scope of Variables (Global vs. Local). · The Global Keyword
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03
Exception Handling
Introduction to Exceptions · Handling Exceptions (The try-except Shield). · Finally & Else · Python Exceptions: Summary Guide
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04
Text File Handling
Opening & Closing a Text File · Text File Open Modes · The with Clause (Context Manager)? · Writing Data · Reading Data · seek() and tell() Methods · r+, w+, a+ Modes · Summary - Text File Handling
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05
Binary File Handling
Binary Files & The Pickle Module · Binary File Modes · Writing Data · Reading Data · The Infinite Loop Problem · Appending & Searching · Updating Records · Summary - Binary File Handling
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06
CSV File Handling
Introduction to CSV & Reading · Writing Data: writerow() vs writerows() · Summary - CSV File Handling
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07
Data Structures: Stack
Introduction to Data Structures · Introduction to Stacks (The LIFO Principle) · Stack Operations · Summary: Data Structure and Stack
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08
Network Fundamentals
Evolution of Networking · Terminologies & Definitions · Summary & Revision
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09
Network Structure
Wired Media (Guided Media) · Wireless Media (Unguided) · Summary & Revision · Types of Networks (The Scale) · Network Topologies (The Shape)
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10
Network Devices and Protocols
Basic Connectivity (The Connectors) · Advanced Devices (Traffic Control) · Summary & Revision
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11
Internet and Web Technologies
Network Protocols · Protocols Overview · Web Concepts (WWW, Hosting & Servers)
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12
Database Fundamentals
Database Concepts · The Relational Data Model · Keys (Primary, Candidate, Alternate, Foreign) · Managing Databases & Aliases
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13
SQL Basics
Data Types & Constraints · Creating & Dropping Tables · Altering the Table (ALTER) · Managing Constraints with ALTER · Inserting Data (INSERT) · Updating Data (UPDATE) · Deleting Data (DELETE) · The SELECT Statement & Basic Filtering · Advanced Filtering (BETWEEN, IN, LIKE, NULL) · Sorting Data (ORDER BY)
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14
Advanced SQL
Aggregate Functions · Grouping Data (GROUP BY & HAVING) · Joins (Cartesian, Equi, Natural)
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15
Python-SQL Connectivity
Connecting & Fetching Data · Modifying Data & Security
KVCoders at a Glance
The scale of what's already here.
Across Class 11 & 12 · Computer Science & Informatics Practices
Learn + Revise
Every chapter, taught before it's tested.
Concept videos, chapter notes, and a growing resource library — mapped to the exact same syllabus structure as the Workspace above.
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Concept notes for every chapter, structured the same way the board exam expects the answer.
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Concept-first videos for every chapter across Class 11–12 CS & IP.
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Notes, marking schemes, and project references in one searchable place.
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Real board, sample, and pre-board papers, ready to download and practice offline.
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Exam Preparation
Board, sample, and pre-board questions — searchable by topic.
2,791+ past-year questions across all classes & subjects, tagged by chapter and topic, free to preview without an account.
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Searchable, topic-tagged questionsFind exactly what you need to revise, not a whole paper.
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Downloadable papers & marking schemesFull papers are available in the Resource Library.
Showing: Class 12 Computer Science
Revision of Class XI Topics 590 PYQs SQL Basics 200 PYQs Advanced SQL 152 PYQs Network Structure 109 PYQsAfter You Practice
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Test & Practice HistoryEvery MCQ, Output, and Live Test attempt, in one place.
Made for the CBSE Class 11 & 12 exam
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- Computer Science (083) and Informatics Practices (065), Class 11 and 12, built by CBSE CS/IP teachers.
- Class 12 follows the CBSE 2026–27 syllabus
- Units and marks taken from the official CBSE curriculum, each linked to its lessons. See the syllabus
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Frequently Asked Questions
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