Hardware Divces Flashcards
What is the information processing cycle in ICT systems?
The information processing cycle involves input(data collection), processing (converting data into information), output(displaying results), and storage (saving data for future use).
Name three input devices commonly used in ICT systems.
- Keyboard
- Mouse
- Touch screen
What are the main output devices in ICT systems?
- Monitor or display
- Speakers and headphones
- Printers
What is the role of storage devices in ICT systems?
Storage devices are used to store data, software, and output results when the computer is not in use or switched off. Examples include hard drives, flash drives, and SSDs.
What are the advantages of using a keyboard as an input device?
- Fast text entry for skilled typists.
- Easy to learn and use.
- Shortcut keys can speed up tasks.
What are the limitations of a touch screen?
- On-screen keyboards are less efficient than physical keyboards.
- Reduced screen space when the keyboard is displayed.
- Less precise for tasks like text entry or drawing.
What is OCR software, and how is it used?
OCR (Optical Character Recognition) software is used to convert scanned images of text into editable text. It compares letter shapes to a database and reconstructs the text for editing.
What are the advantages of using a scanner?
- Converts documents into digital format.
- Preserves old documents and photos.
- Reduces paper usage, benefiting the environment.
What are the limitations of optical media like CDs and DVDs?
- Slow data access.
- Easily damaged by scratches.
- Limited storage capacity compared to modern needs.
What is the difference between RAM and storage?
RAM is volatile (loses data when power is off) and used for temporary data processing, while storage is non-volatile (retains data when power is off) and used for long-term data storage.
What are the advantages of using an SSD over a traditional hard drive?
- Faster data access.
- No moving parts, making it more durable.
- Energy-efficient and quieter.
What are the disadvantages of using a flash drive?
- Easy to lose or steal.
- More expensive per GB compared to hard drives.
- Lower capacity than newer hard drives.
What are the uses of a data projector?
Data projectors are used to project large images of a display onto a screen or wall, making it ideal for presentations, classrooms, and boardrooms.
What are the limitations of a data projector?
- Lower resolution compared to high-quality monitors.
- Limited to 4:3 aspect ratio, which is not ideal for modern movies.
- Lower contrast ratios, resulting in less vibrant images.
What is the purpose of a cellular modem?
A cellular modem allows internet access via a cellular network (3G/4G) by connecting to a USB port or creating a WiFi network for multiple devices.
What are the advantages of using a wireless keyboard?
- Reduces desktop clutter.
- Portable and easy to use.
- No cables to restrict movement.
What are the disadvantages of using a wireless mouse?
- Batteries can run out, making it unusable.
- Less reliable connection compared to wired mice.
- More expensive than wired mice.
What is the role of communication devices in ICT systems?
Communication devices allow ICT devices to connect with each other, enabling data transfer and communication. Examples include cellular modems, ADSL routers, and fibre routers.
What are the advantages of using 3D printing?
- Creates prototypes quickly and affordably.
- Custom parts can be printed on demand.
- Revolutionary designs that are not possible with traditional manufacturing.
What are the limitations of 3D printing?
- Expensive printers and materials.
- Slow printing process.
- Noisy and smelly during operation.
