ICT FINALS Flashcards
Need Five types of internal hardware, components, and external hardware components
Internal:Graphic card,Processor,Ram/rom,Motherboard
External: keyboard, mouse, monitor scanner, and printer
Name two characteristics of Ram
Volatile
Temporary
Name two characteristics of Ram
Volatile
Temporary
Name two characteristics of Rom
Permanent
Nonvolatile
Which device makes solid objects
3-D printer
Data entry devices
Contactless credit card
RFID
Multiple-choice answers in an examination paper
OMR
To scan items in a computerized way and It’s used to scan barcode, which contains unique information about product
Barcode scanner
5 input devices
Keyboard,mouse,joystick,microphone,scanner
5output devices
Speaker,printer,monitor, fax machine,headset
Divided into two:
Application software
System software
Applications software:
Is software used to perform specific tasks
Examples of application software:
Word processor
Image, editor
Examples of System software
Operating system
Utilities
Compiler
Linker
Device driver
Linker is one of the type of systems software
What is linker
It’s a computer program that takes files produced by compiler and combines them into a single program
Compiler is one of them examples of systems software
What is compiler used for?
Is used to translate high-level language into machine codes
Device device is an example of system software
What is the device driver
Enables hardware devices to communicate with computers, operating system
Without drivers a hardware, such as printer wouldn’t be able to operate
Digital
Fixed value
Analogue data
Continuous quality
Types of operating system
Command line interface
Graphic user interference
Command line interface
Requires users to type instructions allows users to interact with computer using the keyboard
Advantages of command line interface
User is indirect communication with the computer
It is possible to alter computer configuration
Disadvantages of command line interface
User needs to learn all the commands
All commands must be correct
All the commands are to be typed
Graphic user interface
Allows users to interact with computer, using pictures or icons
Advantages of graphical user interface
The user does not need to learn all the commands
It is user-friendly
Disadvantages of graphical user interface
Needs more memory
User is limited to icons
Types of computers:
Personal/desktop computer
Laptop/notebook
Smart phone
Tablet
Smart watch
Mainframe computer
Advantage and disadvantage of Personal/desktop computer:
Advantage: unlikely to get damaged, stable Wi-Fi, affordable
Disadvantage: not portable, takes more desk. Space, have to carry all the components to move it
Advantage and disadvantage of Laptop/notebook
advantage: light weight,portable
Disadvantage : easy to be stolen,expensive
Advantage and disadvantage of tablets
Advantage: portable, Fast to switch on
Disadvantage : limited memory, and storage space, expensive
Advantage and disadvantage of smart phone
Advantage: small size, lightweight
Disadvantage small screen, easy for theft
Advantage and disadvantage of smart watch
Advantage, easy to monitor health and fitness delivery notification straight to the users
Disadvantage, small screen, unattractive compared to normal watches
Uses of smart phone
Texting
Listening to music
Video chat
Can track Health and fitness
There are two types of mouses
Touchpad
Trackball
Magnetic stripe reader:
Used to read data found on magnetic stripes
Chip pin reader
Used to make secure payment with POS
RIFD
Contactless cards
MICR
Able to read characters printed in special ink
Is able to read mark’s written in pen or pencil mostly used for choice exams
OMR
Optical character reader( OCR)
Scans texts from hardcopies and convert it into editableforms.used in immigration systems
Barcode reader
Is the scan barcode which contains unique information about products
List input devices
Mouse, remote, joystick, driving wheel, touchscreen scanner, digital camera, graphic lighten WebCam microphone
Output devices
actuator
Advantage and disadvantage of projector
Advantage: able to project to break screens and users can gather around at one place
Disadvantage: expensive,obstacles can block the screen
Types of printers
Inkjet printer
Laser printer
Dotmatrix printer
Wide format printer
3-D printer
Uses of fixed hardware drive
Gaming ,system backups ,performance enhancement
Serial/sequential access
Files are stored one by one in sequence
Example magnetic tape
Random/direct access
Stores files so they can instantly be accessed example DVD CD Blu-ray
Types of CD
CD-r(recordable)
CD-rom(read only)
CD-rw(rewritten) read,deletes,stores
DVD
Movies,Computer games and software applications
Blue-ray
25-125GB(Doesn’t it work in CD players, used to HD movies and
Only recordable once
CDR and DVDR
Advantage of CDR and DVDR
Cheap
Disadvantage of CDR and DVDR
If it is damage, it can’t be reused
Allows data to be written or erased and rewritten
CD-RW and DVD-RW
