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Computer System

CBSE · Class 11 · Informatics Practices

Quick revision notes for Computer System — CBSE Class 11 Informatics Practices. Key concepts, formulas, and definitions for last-minute revision.

57 questions86 flashcards5 concepts

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Key Topics to Revise

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1. Introduction to Computer System

  • A computer is an electronic device that can be programmed to accept data, process it, and generate output.
  • A computer along with additional hardware and software is called a computer system.
  • A computer system primarily comprises CPU, memory, input/output devices, and storage devices.
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2. Central Processing Unit

  • CPU is the electronic circuitry that carries out actual processing and is called the brain of the computer.
  • CPU is also popularly known as processor or microprocessor.
  • Physically, the CPU is placed on one or more microchips called integrated circuits.
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3. Input and Output Devices

  • Input devices send control signals and convert input data into a digital form acceptable by the computer.
  • Examples of input devices include keyboard, mouse, scanner, and touch screen.
  • Specially designed braille keyboards help visually impaired users enter data.
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4. Evolution of Computer

  • ENIAC is the first binary programmable computer based on Von Neumann architecture.
  • Von Neumann architecture consists of CPU, memory, input/output devices, and communication channels.
  • Punched card was an early digital data storage medium.

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Full Notes

Key Concepts

A computer system is a combinationThe CPU is the electronic circuitryThe ALU performs arithmetic and logicalRegisters are the CPU's local memoryPrimary memory is directly used by

Frequently Asked Questions

What are the important topics in Computer System for CBSE Class 11 Informatics Practices?
Computer System covers several key topics that are frequently asked in CBSE Class 11 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 System — CBSE Class 11 Informatics Practices?
Understand the core concepts first, then work through the 57 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall 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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