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NIOS Class 12 Computer Science — Revision Notes

NIOS Class 12 Computer Science revision notes, chapter by chapter across 5 chapters. Starts with Computer Fundamentals, Binary Logic and Computer Software.

How to Revise Effectively

  • Active recall: cover the notes, try to recall the key points, then check.
  • Spaced repetition: revise each chapter again after a day, then after a few days, then after a week or two.
  • Write, don't just read: writing key points and formulas out by hand helps them stick.
  • Teach someone: explaining an idea to a friend is a good test of whether you understand it.

Chapter-Wise Revision Notes — 5 Chapters

  • Working of a Computer - The Four Basic Functions
  • Input Devices
  • Central Processing Unit (CPU)
  • Output Devices
A computer is an electronic deviceInput devices are hardware components usedThe CPU is the 'BrainOutput devices display or communicate resultsPrimary memory is directly accessible by
Read the Computer Fundamentals notes
2

Binary Logic

4 topics
  • 2.1 Number Systems
  • 2.2 One's Complement and Two's Complement
  • 2.3 Character Coding Systems – ASCII, ISCII and Unicode
  • 2.4 Logic Gates
The binary number system uses onlyThe octal number system uses 8The hexadecimal number system uses 16Converting between number systems isOne's complement is obtained by inverting
Read the Binary Logic notes
  • What is Software?
  • System Software
  • Application Software
  • Computer Languages
A complete set of instructions writtenGeneral programs written for a computerThe most important system softwarePrograms written to perform specific tasksThe only language that computers directly
Read the Computer Software notes

2 more chapters below

Revision notes with diagrams and examples for all 5 chapters in Super Tutor.

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Frequently Asked Questions

Where can I find NIOS Class 12 Computer Science Revision Notes?

This page has revision notes for 5 chapters of NIOS Class 12 Computer Science for the board exams 2027. Each chapter links to its own page with the full set.

Go through the syllabus first, then work chapter by chapter: learn the ideas, practise questions, and revise with notes and flashcards. Leave time at the end to revise every chapter once more under timed conditions.

Browse Revision Notes by Chapter

5 chapters

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