Info Tech T2

• Hardware control


  The operating system supports tasks like accepting input, transferring data between primary and secondary memory, and displaying output
• Memory management

  Virtual memory can be used to split a program into manageable blocks when it is too large to fit into main memory
• Software control


  The operating system controls how all software applications, games, or other programs work on the computer
• Starting a computer

  Booting
• Process management

  Allocates time for processes to use the CPU, checks on processes waiting to use the CPU, and signals when the CPU is available
• System software


  The software that controls hardware and how all other software works
• Popular operating systems

  • Microsoft Windows 10
  • Apple's Mac OS X
  • Many versions of LINUX
  • Apple iOS
  • Google Android
• File management

  A file manager checks the amount of memory needed to save, copy, rename, and delete files, and manages the organization of files in secondary storage
• Application software is any program that enables the computer to carry out one or more specific tasks
• Utility software

  Specialized software that protects and maintains the system software, including protecting against computer viruses, backing up files, and recovering files after software crashes
• Input/output management


  The flow of information among devices must be managed and coordinated using device drivers
• Customised and custom-written software

  • Customised software is general-purpose software modified to perform specific tasks for the user
  • Specialised software is written solely for a specific task rather than a range of functions
  • Integrated software includes all major types of application (e.g., word processing, spreadsheet, database) into a single software package
• Hardware interfaces


  • Touchscreens
  • Sensors
  • Digital cameras
  • Special keyboards
• Software interfaces

  • Command-line interface
  • Menu-driven interface
  • Graphical user interface (GUI)
• Command-line interfaces require you to type in commands using a special language
• General-purpose software


  • Applications that are not specific to any organization or business and can be used by anybody
• A menu is a list of options from which you can choose what you want to do
• Graphical user interfaces (GUI) are presently regarded as the easiest type of user interface to use
• Hard drive


  • Computers now use DDR 4 RAM
• Specification


  A list of the key components that make up the computer system
• Companies that manufacture most of today’s PC processors

  • Intel Inc.
  • AMD Inc.
• RAM


  The main working memory in a computer that is used by the processor to run programs. It is measured in gigabytes (GB)
• Processor

  A component of a computer system that performs most of the processing inside the computer. It is measured in megahertz (MHz) or gigahertz (GHz) and relates to the number of operations it can perform per second
• Hard drive


  The computer’s main storage area that stores the applications and programs that run on the PC, as well as any work created by users
• Important components to take account when reviewing a computer specification

  • The processor
  • The amount of RAM
  • The size of the hard drive
• Operating system and computer hardware


  Form a complete system that determines what your computer can do
• Operating system


  A program that lets you interact with your computer
• Computer, laptop or mobile device does not respond when power is turned on

  1 Ensurethatthepowercableisconnectedtothe

  power connector on the back of the computer or

  device and plugged into the electrical outlet. 2 If it is plugged into a power strip or surge

  suppressor, check that the power strip is connected

  to an outlet and turned on.

  3 Make sure that the electrical outlet is working. I-1is

  can be done by testing it with another device such

  as the monitor or a printer.
• Printer problems

  1 Ensure the printer driver is installed on the

  computer.

  2 Ensure that the printer is plugged into a power strip

  or outlet and the printer is turned on.
• Printer is receiving power but is not printing correctly

  1. Ensure the printer contains one or more ink cartridges or that the correct toner is installed.
  2. If the print quality is poor, the ink or toner cartridge may need to be replaced. 3. Some printers use Wi-Fi, so check on the display panel to see if the printer's Wi-Fi is connected.
• If no paper is seen when you try to print

  1. Ensure no parts of the printer are open.
  2. Check that paper is correctly placed in the printer.
• Printout is blank

  1. Change the ink or toner cartridge
  2. If the problem persists, seek further technical assistance since the nature of the problem may require an experienced technician or a new printer.
• Monitor problems

  Blank screen

  1. Check the monitor power light - if it is off, then press the button to ensure that the monitor is turned on. If the power light is on, then the monitor has power.
  2. Ensure the electrical outlet is working by testing with another device.
• Screen difficult to read

  1. Monitor settings may need to be adjusted (such as colour, contrast or brightness).
  2. Ensure that no strong sources of magnetism are near to the monitor - such as speakers and amplifiers.
• Battery problems The battery may need charging or replacing if:

  1. the laptop or mobile device shuts off when the power adapter is unplugged

  2. the device powers off soon after use.

  3. the battery icon indicates that a battery is not

  detected or found.