Main features of a GUI ( Graphical User Interface ) :
_ Allow the user to interact with a computer ( or MP3 playre, gaming device, mobile phone, etc.) using pictures or symbols ( icons ) rather than having to type in a number of commands.
Importance of backing up data :
_ Data could be lost due to failure of the original storage device.
_Hackers could be responsible for the corruption or even loss data.
_Backups are also made in case the files need to be used somewhere else.
Describe an Operating system:
_An operating system is a special piece of software that manages the general operation of a computer system.
Ex: Mac OS, Microsoft for computers and laptops.
Describe Hardware:
Hardware is the physical parts of the computer system – the parts that you can touch and see.
Is a general term for the programs that the hardware to run properly
Ex: Mouse, keyboard, monitor
Describe Software:
Is a general term for the programs that control the computer
There are two types of softwares :
_ System software: programs that allow the hardware to run properly: operating system
_Application software: programs that allow the user to do specific things : spreadsheet
Describe two analogue sensors
_Temperature: Automatic washing machine, central heating systems, automatic greenhouse, ovens
_Lights: automatic greenhouse, automatic doors, burglar alarm systems, street lightning control.
Ad/Dis of Protable Hard Disk:
_Ad: The data access time and data transfer rate are very fast
They have large memory capacities
They can be used as a method of transferring information between computers
_Dis: As with fixed drivers a portable hard disk can be easily damaged if the user accidentally drops it or does not shut it down correctly after use.
Ad/Dis of DVD ROM:
_Ad: they hold fat more data than floppy disk so one CD/DVD could replace floppy disks in some application.
They are less expensive than hard disk driver system
_Dis: the data transfer rate and data access time are slower than for hard disk.
Use
_CD/DVD ROM:
_ Are used to store films, store computer data and ever more sophisticated computer and arcade games
_Pendrive
_Are used for transporting files between computers or as a back up store.
_Are used as a security device a dongle to prevent software privacy.
_Magnetic Tape:
Tapes are used where large amounts of data need to be stored, but where quick access to individual files is not required. A typical use is for data back-up (lots of data, but rarely only accessed in an emergency)
Tapes are also used and in some batch-processing applications (e.g. to hold the list of data that will be processed)
_Flash Memory Card:
Store photos on digital cameras
Mobile Phones use them as memory cards
Used in MP3 to store music
Are used as back up store in handheld computer device
_Fixed Hard Drive
Are used to store operating system and working data
Are used for storing application software that needs retrieval and st
_ Allow the user to interact with a computer ( or MP3 playre, gaming device, mobile phone, etc.) using pictures or symbols ( icons ) rather than having to type in a number of commands.
Importance of backing up data :
_ Data could be lost due to failure of the original storage device.
_Hackers could be responsible for the corruption or even loss data.
_Backups are also made in case the files need to be used somewhere else.
Describe an Operating system:
_An operating system is a special piece of software that manages the general operation of a computer system.
Ex: Mac OS, Microsoft for computers and laptops.
Describe Hardware:
Hardware is the physical parts of the computer system – the parts that you can touch and see.
Is a general term for the programs that the hardware to run properly
Ex: Mouse, keyboard, monitor
Describe Software:
Is a general term for the programs that control the computer
There are two types of softwares :
_ System software: programs that allow the hardware to run properly: operating system
_Application software: programs that allow the user to do specific things : spreadsheet
Describe two analogue sensors
_Temperature: Automatic washing machine, central heating systems, automatic greenhouse, ovens
_Lights: automatic greenhouse, automatic doors, burglar alarm systems, street lightning control.
Ad/Dis of Protable Hard Disk:
_Ad: The data access time and data transfer rate are very fast
They have large memory capacities
They can be used as a method of transferring information between computers
_Dis: As with fixed drivers a portable hard disk can be easily damaged if the user accidentally drops it or does not shut it down correctly after use.
Ad/Dis of DVD ROM:
_Ad: they hold fat more data than floppy disk so one CD/DVD could replace floppy disks in some application.
They are less expensive than hard disk driver system
_Dis: the data transfer rate and data access time are slower than for hard disk.
Use
_CD/DVD ROM:
_ Are used to store films, store computer data and ever more sophisticated computer and arcade games
_Pendrive
_Are used for transporting files between computers or as a back up store.
_Are used as a security device a dongle to prevent software privacy.
_Magnetic Tape:
Tapes are used where large amounts of data need to be stored, but where quick access to individual files is not required. A typical use is for data back-up (lots of data, but rarely only accessed in an emergency)
Tapes are also used and in some batch-processing applications (e.g. to hold the list of data that will be processed)
_Flash Memory Card:
Store photos on digital cameras
Mobile Phones use them as memory cards
Used in MP3 to store music
Are used as back up store in handheld computer device
_Fixed Hard Drive
Are used to store operating system and working data
Are used for storing application software that needs retrieval and st