Aim One

What is an Information Technology system

An IT system includes all hardware and software used for specific purposes

What is a Multi functional device and give an example 1

A device that performs several functions. Example: a printer that prints scans and photocopies

What is a sever used for ?

It provides services to to other computers, such as centrally storing and sharing files over a network.

What is a home cinema used for ?

It reproduces a cinema-like experience at home, including films and audio.

What can a desktop computer be used for ?

Video and music playback, gaming and other computing tasks.

How do digital cameras store images ?

They encode images as pixels and store them on memory cards.

Name three video capabilities of digital devices.

Time-lapse, slow motion and dash cam or parking mode

What are security cameras used for ?

Monitoring homes, streets, and commercial properties to improve security.

What is the purpose of traffic speed cameras ?

To detect vehicles exceeding speed limits and support road safety enforcement

What can navigation systems do ?

Display maps, locate positions, provide directions and suggest alternative routes using traffic information.

What is a device driver ?

Software that allows the operation system to communicate with a hardware device.

Why does an operating system need device drivers ?

To translate signals and commands so the OS and hardware can communicate

What happens when the OS receives a signal but resources are busy ?

The signal can be held in a buffer and placed in a queue until resources are available.

What is a linear barcode?

A one-dimensional barcode made of lines that can be read by a barcode scanner.

What is a 2D barcode ? Give an example

A barcode that stores information in two dimensions Example: A QR code

What is one advantage of a 2D barcode over a linear barcode

It can store more information in a small area.

What does HDD stand for ?

Hard Disk Drive

What does SSD stand for ?

Solid state drive

What is the speed of HDD ?

HDD has a higher latency, longer read/write times, and supports fewer IOPs(input output operations per second) compared to SSD

What is the speed of SSD ?

SDD has a lower latency, faster read/writes, and supports more IOPs (input output operations per second) Compared to HDD

Is SSD or HDD more expensive and why ?

SSD are more expensive compared to HDD. HDD are an older and more established technology

What does IOPS stand for?

Input/Output Operations Per Second. It measures how many read and write operations a device can perform per second.

How does an HDD store data?

It stores data magnetically on rotating disks called platters.

How does an SSD store data?

It stores data electronically using flash memory chips.

The accessibility features/devices on voice or speech recognition.

• It allows users to give instructions to digital devices or to input data using their voices

• Good for people with visual impairments or problems with hands/limbs#

• Many devices have personal assistants

The accessibility features/devices on screen recorders

• Software that reads aloud the words or content to the computer screen.

• Useful for people with visual impairments

• Will also read alt text for images

The accessibility features/devices on touch screen

Beneficial for individuals who cannot use a keyboard

The accessibility features/devices on keyboards with large keys

Helpful for visually impaired people

The accessibility features/devices on ergonomic keyboards and mouse

Designed to aid those with repetitive strain injury

The accessibility features/devices on screen magnifiers

Magnifiers: benefits those with visual impairments

screen overlays: Good for conditions such as dyslexia as they change the backgrounds

The accessibility features/devices on screen overlays

screen overlays: Good for conditions such as dyslexia as they change the backgrounds

The accessibility features/devices on eye motion sensors

Enable control through eye movement

The accessibility features/devices on key less cars

This technology can be convenient for anyone but is also particularly useful for anyone with dexterity difficulties.

In application software what is its general purpose

Word processor, spreadsheet or graphics package, can be used for different purposes

In application software what is its special purpose

Performs a single task or set of tasks. Example includes payroll and account packages , hotel booking software, fingerprint scanning systems, browsers software and hundreds of other apps

Factors affecting the choice and use of application software: documentation

A well-documented package will help an individual or organisation make the most of it’s facilities

Factors affecting the choice and use of application software: Support

Some manufactures provide a free or paid for support to answer any questions regarding the software.

Factors affecting the choice and use of application software: Training

Course delivered either by the manufacture or by a third party may be available for some software

Factors affecting the choice and use of application software: Site licensing

If multiple copies are needed, is there a good deal on the licence

Factors affecting the choice and use of application software: Functionality

It is essential that the software provides all the necessary functionality