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