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Int 2 software slides 2010

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    Int 2 software slides 2010 Int 2 software slides 2010 Presentation Transcript

    • Computer Software Mr Arthur
    • Aims of Lesson 1
      • Go over Network test
      • What is an Operating System?
      • Application Software
    • Operating System
      • The OS is the program that provides the HCI, manages input and output and controls all Main Memory and Backing Storage devices
      • The Bootstrap is a program that loads the OS from Backing Storage
      • Examples
        • Windows XP/Vista/7/MACOS/Linux
      • Key functions
        • Providing the HCI
        • Displaying data on screen
        • Creates Hierarchical filing system
        • Saving files to backing storage
        • Provides security
        • Controls input/output devices
    • Application Software (Apps)
      • Application software does not control parts of the computer but is written to the help the user perform a particular task
      • Examples
        • Microsoft Word
        • Microsoft Excel
        • Itunes
        • Powerpoint
    • Lesson Starter
      • What is an Operating System?
      • Give 3 functions on an Operating System
      • What is Application software?
    • Aims of Lesson 2
      • Last Lesson
      • What is an Operating System?
      • Application Software
      • Today’s Lesson
      • Standard File Formats
      • Objects and Operations
    • Standard File Formats
      • A Standard File Format is a file format that can be opened up on many different applications
      • Text
        • ASCII, txt, Rich Text Format
      • Graphics
        • JPEG, Bitmap, Gif
    • Objects and Operations Application Object Operation Word Processing Letter/Word Format Size/Style/Cut/Paste/Align Graphics Image Crop/Rotate/Rescale Spreadsheet Text/Number Format Size/Cut/Paste/Align Database Field/Record Change Field Type/Sort/Search
    • Aims of Lesson 3
      • Last Lesson
      • What is an Operating System?
      • Application Software
      • Standard File Formats
      • Objects and Operations
      • Today’s Lesson
      • Computer Virus
      • Symptoms of a Virus
      • How they Spread
      • Antivirus
    • Computer Virus
      • A virus is a destructive piece of software that attaches itself to other files, reproduces, spreads and corrupts files or data
      • Virus Symptoms
        • Strange noises or visual effects
        • Unexpected reboot of computer
        • Unwanted creation of emails
        • Displaying unwanted messages
      • How they Spread
        • Spread through infected memory sticks, cds
        • Visiting infected websites and downloading code
        • Downloading infected email attachments
    • Antivirus Software
      • Anti-virus software often works by having a database of virus signatures (parts of code that are viruses)
      • The software then scan documents, files etc comparing them to the virus signatures
      • The software then flags up the virus it has found
      • Antivirus software needs to be constantly updated to add new virus signatures to the database
    • Arrangements
      • Distinction between an operating system and an application program with examples of each
      • Explanation of the need for standard file formats
      • Description of the following standard file formats for text files: text, ASCII, rich text file
      • Identification of data objects and operations in the context of word processing, databases, spreadsheets and graphic packages
      • Definition of a virus
      • Description of how a virus operates
      • Description of the following common symptoms of virus infection: displaying unwanted messages, unusual visual/sound effects, computers rebooting unexpectedly, unwanted generation of e-mails
      • Description of how viruses are spread via floppy disk, homemade CDs, ‘fun’ websites and e-mail attachments
      • Explanation of the need for anti-virus software