Computer Systems Chapter 1

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Questions and Answers

What is one of the main characteristics of computers?

  • Limited storage capacity
  • Inaccuracy
  • Complexity in design
  • High speed (correct)

The word 'computer' is derived from the word 'compute.'

True (A)

What is the purpose of processing data in a computer?

To convert data into information.

A computer accepts, sorts, selects, moves, and compares various types of ______.

<p>information</p> Signup and view all the answers

Match the following terms with their definitions:

<p>Data = Raw, unorganized facts Information = Processed and organized data Computer = A fast calculator Information Processing Cycle = The sequence of operations to convert data into information</p> Signup and view all the answers

What is the first part of the information processing cycle?

<p>Input (C)</p> Signup and view all the answers

Output is a mandatory step in the information processing cycle.

<p>False (B)</p> Signup and view all the answers

What term is used to describe the set of instructions given to a computer to perform various operations?

<p>computer program</p> Signup and view all the answers

The physical parts or devices of a computer system are referred to as _____

<p>hardware</p> Signup and view all the answers

Match the following components of the information processing cycle with their correct definitions:

<p>Input = Accepting data from a source Processing = Performing actions on the data Output = Displaying the results of processing Storage = Permanently storing processed results</p> Signup and view all the answers

Flashcards

Computer

A device that processes data to create useful information, originally designed as a fast calculator for complex calculations.

Data

Raw, unorganized facts and figures.

Information

Data that has been processed, organized, and presented in a useful context to answer questions or solve problems.

Information Processing Cycle

The series of steps a computer takes to change data into useful information, by performing operations on the data, and displaying the results.

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Computer System

A collection of interconnected components working together to process data and produce information.

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Input

The part of the information processing cycle where a computer receives data from a source, like a user or another program.

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Processing

The part of the information processing cycle where the computer performs operations on the input data, based on instructions from a program.

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Output

The part of the information processing cycle where the computer displays the results of its processing.

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Storage

The part of the information processing cycle where the computer saves the results permanently.

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Information Processing Cycle

The complete set of steps a computer follows to receive, process, display, and store information.

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Computer Program

A set of instructions that tells a computer what to do.

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Data Processing

Changing input data into a required output using a computer program.

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Hardware

The physical components of a computer system, such as the circuits and devices.

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Software

The set of instructions (programs) that tell a computer what to do.

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Study Notes

Chapter 1: Introduction to Computer Systems

  • Objectives:
    • Learn the concept of a computer system.
    • Understand how computers have evolved.
    • Understand computer classifications.
    • Learn about computer applications.
    • Understand computer characteristics (speed, accuracy, efficiency, storage capacity, versatility).
    • Understand computer limitations.
    • Discuss similarities and differences between humans and computers.
    • Understand computer components.

1.1 Introduction - Computer

  • The word "computer" comes from the word "compute".
  • Originally, a computer was a fast calculator.
  • Today, computers perform various tasks beyond basic calculations.

1.2 Computer As Data Processor

  • Data: Unorganized, raw facts needing processing.
  • Information: Processed, organized data presented usefully.
  • Data is transformed into Information.

1.2.2 The Information Processing Cycle

  • Input: Data received from sources.
  • Processing: Computer actions on data based on instructions.
  • Output: Results presented (text, numbers, graphics, sound).
  • Storage: Permanent storage of results. (Disk, tape).

1.2.3 Computer As Data Processor

  • Computer program: Instructions guiding operations.
  • Data Processing: Converting input data to output.
  • Computers process information rapidly by following instructions.

1.3 Classification of Computers

  • Analog Computers:
    • Recognize data as continuous measurements (voltage, speed).
    • Output in form of dials, graphs.
  • Digital Computers:
    • Use discrete signals (high/low voltage states: 1's and 0's).
    • Numbers, alphabets, symbols represented as code.
  • Classifications based on size/capacity:
    • Small Computers (Microcomputers, PCs) - basic/everyday use.
    • Note Book/Laptops - portable use
    • Handheld - smaller-portable
    • Mini computers - more powerful than microcomputers. Wide use in process control
    • Mainframe computers - high speed; large organizations
    • Super computers - fastest; complex tasks; parallel processing

1.3 Hybrid Computers

  • Combine analog and digital features.
  • Useful when input is analog (measurements). Converted to digital for processing.
  • Input from sensors, conventional output methods.

Hardware and Software

  • Hardware: Physical components (integrated circuits, storage, input/output devices).

  • Software: Programs, procedures, and documentation. (Used to control operation of hardware)

  • Computer hardware can’t function on its own without software instructions.

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