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Questions and Answers
What distinguishes a trackball from a mouse?
What distinguishes a trackball from a mouse?
Which of the following describes the function of a scanner?
Which of the following describes the function of a scanner?
What is the main purpose of a keyboard in computing?
What is the main purpose of a keyboard in computing?
Which device allows for handwriting on a screen?
Which device allows for handwriting on a screen?
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What type of microphone converts sound into an electrical signal?
What type of microphone converts sound into an electrical signal?
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What is the primary difference between digital and analog cameras?
What is the primary difference between digital and analog cameras?
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Which of the following devices displays images from a computer?
Which of the following devices displays images from a computer?
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Which type of monitors is known for using a tube for image display?
Which type of monitors is known for using a tube for image display?
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What is a Personal Digital Assistant (PDA)?
What is a Personal Digital Assistant (PDA)?
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Which of the following features is NOT typically associated with mobile phones?
Which of the following features is NOT typically associated with mobile phones?
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What is the primary function of the operating system in a smartphone?
What is the primary function of the operating system in a smartphone?
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Which operating system is NOT mentioned as a common one for smartphones?
Which operating system is NOT mentioned as a common one for smartphones?
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Which device merges the functionality of PDAs, cameras, and computers?
Which device merges the functionality of PDAs, cameras, and computers?
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What technology do LCD monitors utilize compared to CRT monitors?
What technology do LCD monitors utilize compared to CRT monitors?
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What is the main advantage of LCD monitors over CRT monitors?
What is the main advantage of LCD monitors over CRT monitors?
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How is monitor size typically measured?
How is monitor size typically measured?
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What distinguishes a local printer from a network printer?
What distinguishes a local printer from a network printer?
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Which type of printer uses a laser to transfer an image to paper?
Which type of printer uses a laser to transfer an image to paper?
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What is a primary use for plotters in printing?
What is a primary use for plotters in printing?
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How do thermal printers create images on paper?
How do thermal printers create images on paper?
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What type of ink does an inkjet printer primarily use?
What type of ink does an inkjet printer primarily use?
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What is the primary purpose of a personal computer (PC)?
What is the primary purpose of a personal computer (PC)?
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Which type of computer is best suited for small to medium-sized organizations?
Which type of computer is best suited for small to medium-sized organizations?
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What is a major advantage of desktop computers compared to laptops?
What is a major advantage of desktop computers compared to laptops?
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For what reason might someone choose to use a laptop over a desktop computer?
For what reason might someone choose to use a laptop over a desktop computer?
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What distinguishes mainframe computers from other types?
What distinguishes mainframe computers from other types?
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Which type of computer would be less convenient for frequent movement?
Which type of computer would be less convenient for frequent movement?
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What defines the classification of a minicomputer?
What defines the classification of a minicomputer?
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Which statement is true about a laptop compared to a tablet PC?
Which statement is true about a laptop compared to a tablet PC?
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Study Notes
Input Devices
- A mouse is an input device used to interact with a graphical user interface (GUI).
- Keyboards primarily function for data entry and issuing commands.
- Scanners convert printed materials into digital format, typically creating an image.
- Text recognition software can convert scanned images of text into digital text.
- Touchpads emulate mouse movements, allowing users to control the cursor through touch.
- Lightpens enable handwriting on a computer screen and can also function as a mouse.
- Joysticks, often used in video games, provide multi-button control over in-game objects.
- Microphones convert sound waves into electrical signals for recording, online communication, video conferencing, and speech-to-text applications.
- Webcams are cameras designed for real-time video transfer over the internet.
- Digital cameras store photographic data in digital formats and can be connected to computers for image transfer. The resolution of digital photographs is measured in megapixels (MP).
Output Devices
- Monitors display images from the computer, enabling users to view, work, and control the system.
- CRT monitors use cathode ray tubes, while LCD monitors use liquid crystal technology. LCD monitors are typically more energy-efficient, radiation-free, and compact compared to CRT monitors.
- Monitor size is measured diagonally in inches.
- Picture resolution, or quality, is specified in the number of pixels horizontally and vertically (e.g., 1920 x 1080).
- Projectors project a computer image or other images onto a canvas or wall from various sources like computers, DVD players, and Blu-ray players.
- Printers transfer data from a computer onto paper. Local printers directly connect to the computer, while network printers connect to a network via a network card.
- Printers are also categorized by their printing technology, such as dot matrix, laser, inkjet, thermal, and plotters.
- Dot matrix printers use an ink ribbon and print head with pins to create images on paper.
- Laser printers employ laser light to transfer toner onto a drum and then onto paper using heat.
- Inkjet printers utilize tiny ink jets to create images using a combination of cyan, magenta, yellow, and black inks.
- Plotters are designed for printing large images, often used in professional fields for technical drawings and blueprints.
- Thermal printers utilize heat to create prints on heat-sensitive paper. They are typically smaller, quieter, and less expensive, commonly used for receipts and calculator printing.
Speaker
- Speakers are used to generate audio output from a computer's sound card.
Computer Classification
- Computers are classified based on user capacity, physical size, and typical user/purpose.
Personal Computer (PC)
- Personal computers are built for individual use.
- Desktop computers are stationary and usually offer a lower cost per performance ratio.
- Laptop or tablet computers offer portability and are often favored when computing power is not a primary concern.
Portable Digital Devices
- Personal Digital Assistants (PDAs) are small, handheld computers that can be used for various functions and connected to mobile phones.
- Mobile phones have evolved significantly, offering diverse features such as text messaging, internet access, contact information management, calculator functions, clock, alarm, recording, photo display, video playback, multimedia messaging (MMS), audio recording, and more.
- Smartphones are essentially fusion devices combining the functionalities of mobile phones, PDAs, cameras, camcorders, and computers.
- They rely on operating systems for program development and functionality. Common smartphone operating systems include iOS, Android, Symbian, BlackBerry, Palm Pilot, and Windows Phone.
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Description
Test your knowledge on various input devices used in computing. This quiz covers everything from traditional keyboards and mice to scanners, and even modern tools like webcams and digital cameras. Discover how these devices function and their roles in user interaction.
