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Computer Software

NIOS · Class 12 · Computer Science

Quick revision notes for Computer Software — NIOS Class 12 Computer Science. Key concepts, formulas, and definitions for last-minute revision.

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Key Topics to Revise

1

What is Software?

  • Software is a complete set of instructions written to solve a problem on a computer.
  • Software causes the hardware to function in the desired manner.
  • Without software, hardware cannot perform any calculation, comparison, or manipulation.
2

System Software

  • System software consists of pre-written programs supplied by the manufacturer with the computer.
  • Primary objectives: (1) enhance efficiency of hardware utilisation, (2) make computers simple to use.
  • Main components: Operating System, Language Translators (Compilers/Interpreters), Utilities.
3

Application Software

  • Application software is written to perform a specific task or process (e.g., accounting, payroll, mailing lists).
  • Most application software is written in high-level languages.
  • Three sources of application software: (1) Write it yourself, (2) General-purpose packages, (3) Customised software.
4

Computer Languages

  • A programming language is a set of rules that provides a way of instructing a computer to perform operations.
  • Languages are lower (closer to machine, i.e., 0s and 1s) or higher (closer to human language).
  • Three main categories: Machine Language, Assembly Language, High-Level Language.

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Full Notes

Key Concepts

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

Frequently Asked Questions

What are the important topics in Computer Software for NIOS Class 12 Computer Science?
Computer Software covers several key topics that are frequently asked in NIOS Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Computer Software — NIOS Class 12 Computer Science?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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