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NCERT solutions, question by question
Class 11 Computer Science
CBSE 2026–27 · 17 chapters · concept notes, NCERT solutions, examples & practice
- 1Unit I — Computer Systems and Organisation: Basic computer organisation, CPU, memory, I/O
- 2Unit I — Software types, operating system basics, Boolean logic (AND, OR, NOT, NAND, NOR, XOR)
- 3Unit I — Number systems: binary, octal, decimal, hexadecimal and inter-conversions
- 4Unit I — Encoding schemes: ASCII, ISCII, Unicode (UTF-8, UTF-32)
- 5Unit II — Getting started with Python: interpreter, execution modes, tokens, comments
- 6Unit II — Python fundamentals: data types, variables, operators, expressions, type conversion
- 7Unit II — Flow of control: if/elif/else, while and for loops, break, continue, nested loops
- 8Unit II — Strings: traversal, slicing, string methods and built-in functions
- 9Unit II — Lists and tuples: operations, methods, nested lists, list manipulation programs
- 10Unit II — Dictionaries and sets: key-value pairs, methods, dictionary programs
- 11Unit II — Introduction to Python modules: math, random, statistics
- 12Unit II — Functions: user-defined functions, arguments, default and keyword parameters, scope
- 13Unit III — Introduction to problem solving: problem definition, algorithms, flowcharts, pseudocode
- 14Unit III — Decomposition, debugging and testing
- 15Unit IV — Society, Law and Ethics: digital footprint, netiquette, IPR, plagiarism, licences
- 16Unit IV — Cyber safety, cyber crime, IT Act, e-waste management, Indian IT rules
- 17Practical — Python programs, data file basics, project work and lab record