ICT : Types of Computer
What is quantum cryptography?
* Used to secure data * Encrypting data * Encryption * cryptography is the science of making a message unintelligible to any hackers (encryption) * Quantum cryptography is based on the use of photons (light) and their physical quantum properties to produce a virtually unbreakable cryptography system * it is based on the laws of physics rather than mathematics
How does a GUI work?
* allows the user to interact with a computer using pictures of icons rather than typing in a number of commands * whole of CLI code can be replaced by a single icon * use various technologies to provide the user interface
What is Artificial Intelligence biometrics?
* authenticate who you are using dynamic profiling
What are the different types of artificial intelligence biometrics?
* facial recognition * iris scan * retina scan * fingerprints * voice recognition
What is a mainframe computer?
* large, very powerful, computer system * main purpose is to run commercial applications such as banking and insurance where huge amounts of data need to be processed every day * have several CPUs * fast processor speeds * multiple operating systems * huge amounts of storage capacity * huge internal memories (several hundred gigabytes of RAM) * operate using time sharing or batch processing
Give two advantages of a PDA compared to a laptop computer
1. Very small in size and lightweight- easily portable 2. able to make phone calls and text messages
Give two disadvantages of a PDA compared to a laptop computer
1. easily stolen or lost because of the small size 2. memory size in most phones isn't very large compared to laptops
Give three functions of an operating system
1. the loading and running of programs to occur 2. user to communicate with the computer 3. managing of security (for example, user accounts, log on password)
Describe the difference of feature and function of a camera
A feature of a smartphone is a camera. (what is has) A function of a smartphone is taking photos. (what it can do)
Word Processing - Compilers - Interpreters - Spreadsheet -
Application Systems Systems Application
The ____ is a piece of hardware that is the brains of the computer and it turns data into ______
CPU, information
What does CLI stand for?
Command line interface
What are HDD and SDD and what do they stand for?
HDD stands for Hard Disk Drive and SDD stands for solid state drive. *They are a computer's main internal storage device. *where the applications software, disk operating system and files are stored *main advantage of these storage devices is the fast data transfer/access times and their large capacity to store data *HDD has moving parts *SDD doesn't
What are the disadvantages of a CLI?
It is slow The user therefore has to learn a number of commands just to carry out basic operations
___ is a fast temporary memory where programs and data are stored only when the power is supplied
RAM
___ is held on a computer chip and is called volatile memory because the contents disappear when the power is turned off
RAM
There are two types of internal memory called ROM and RAM. Describe the differences between ROM and RAM.
RAM is fast temporary memory where programs and data are are stored only when the power is supplied, it is held on a computer chip and is volatile memory (the contents disappear when the power is turned off ROM is fast permanent memory used for holding instructions needed to start the computer up, it is held on a computer chip and is non-volatile memory (does not lose its contents when the power is turned off)
___ is fast permanent memory used for holding instructions needed to start the computer up
ROM
____ is held on a computer chip and is called non-volatile memory because it does not lose its contents when the power is turned off
ROM
What are the advantages of a CLI
The user is in direct communication with the computer and not restricted to a number of predetermined options
What are the disadvantages of GUI?
Uses more memory than a CLI The user is limited to the icons provided on the screen Needs and OS
What technology does GUI provide to the user interface?
WIMP
What does WIMP stand for and how does it benefit the user interface?
Windows, Icon, Menu, Pointer and it is more intuitive
A computer which has a full-sized screen and is normally used in one place is called a ______ computer
desktop
What does GUI stand for?
graphic user interface
If you can physical touch it then it is _____
hardware
Computer systems consist or two main parts: ______ and _______
hardware, software
______ devices such as the keyboard and mouse are used to enter data into the computer for processing
input
There are two types of software called ____ ____ software and _______ software
operating system, applications
8. After data has been processed, the results of processing are passed to an _____ device
output
Post-WIMP interaction is a use interface that allows _____ and rotating
pinching
How does CLI work?
requires a user to type in instructions to choose options from menus, open software and so on often a number of commands that need to be typed in to save or load a file
Computer hardware is useless without the _______ which is used to give it instructions as to what to do
software
What does user interface mean?
the means by which the computer and the user interact