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Questions and Answers
What is the primary purpose of an input device?
What is the primary purpose of an input device?
- To display processed data
- To receive data from the computer
- To translate data into visual, auditory, or physical form
- To provide data and control signals to a computer (correct)
Which of the following is NOT an example of an input device?
Which of the following is NOT an example of an input device?
- Monitor (correct)
- Keyboard
- Microphone
- Mouse
What is the primary function of an output device?
What is the primary function of an output device?
- To translate data into visual, auditory, or physical form (correct)
- To enable users to communicate with the computer
- To receive data from a computer
- To provide data and control signals to a computer
Which of the following is NOT an example of an output device?
Which of the following is NOT an example of an output device?
Which type of key on a keyboard is used for navigating within a document or application?
Which type of key on a keyboard is used for navigating within a document or application?
What is the primary purpose of the function keys (F1-F12) on a keyboard?
What is the primary purpose of the function keys (F1-F12) on a keyboard?
Which type of key on a keyboard is used to enter letters and numbers?
Which type of key on a keyboard is used to enter letters and numbers?
What is the purpose of the Shift, Ctrl, and Alt keys on a keyboard?
What is the purpose of the Shift, Ctrl, and Alt keys on a keyboard?
What is the primary function of a sheet-fed scanner?
What is the primary function of a sheet-fed scanner?
Which input device captures sound waves and converts them into an electrical signal?
Which input device captures sound waves and converts them into an electrical signal?
What is the primary purpose of a webcam?
What is the primary purpose of a webcam?
Which input device is primarily used for photography and videography?
Which input device is primarily used for photography and videography?
How does a handheld scanner function?
How does a handheld scanner function?
What is the main difference between a digital camera and a webcam?
What is the main difference between a digital camera and a webcam?
Which input device allows users to interact with a digital display using touch gestures?
Which input device allows users to interact with a digital display using touch gestures?
What is the common feature between sheet-fed and flatbed scanners?
What is the common feature between sheet-fed and flatbed scanners?
Which of the following is NOT a way a printer can connect to a device?
Which of the following is NOT a way a printer can connect to a device?
What is the primary function of the DAC (Digital-to-Analog Converter) in a computer's sound card?
What is the primary function of the DAC (Digital-to-Analog Converter) in a computer's sound card?
What is the primary purpose of a modem?
What is the primary purpose of a modem?
What is the purpose of the modulation process in a modem?
What is the purpose of the modulation process in a modem?
What is the purpose of the demodulation process in a modem?
What is the purpose of the demodulation process in a modem?
Which of the following is NOT a function of a speaker in a computer's audio system?
Which of the following is NOT a function of a speaker in a computer's audio system?
What is the primary purpose of a combined input/output device like a modem?
What is the primary purpose of a combined input/output device like a modem?
Which of the following is NOT a function of a modem's demodulation process?
Which of the following is NOT a function of a modem's demodulation process?
What is the primary advantage of touchscreens?
What is the primary advantage of touchscreens?
Which of the following is an older display technology that uses electron guns to illuminate phosphors?
Which of the following is an older display technology that uses electron guns to illuminate phosphors?
What is the primary advantage of LED displays compared to regular LCDs?
What is the primary advantage of LED displays compared to regular LCDs?
What is the term used to describe the number of pixels on a display screen?
What is the term used to describe the number of pixels on a display screen?
Which of the following measures how quickly a pixel can change colors?
Which of the following measures how quickly a pixel can change colors?
What is the term used to describe how many times the screen is redrawn in a second?
What is the term used to describe how many times the screen is redrawn in a second?
Which of the following display technologies is known for being thinner and consuming less power than CRTs?
Which of the following display technologies is known for being thinner and consuming less power than CRTs?
What is the primary output device used with computers to present visual information?
What is the primary output device used with computers to present visual information?
What aspect ratio is commonly used for screens?
What aspect ratio is commonly used for screens?
What type of printer uses a laser beam to produce images on a drum?
What type of printer uses a laser beam to produce images on a drum?
Which printer type is known for high-speed printing and quality outputs?
Which printer type is known for high-speed printing and quality outputs?
What does DPI stand for in relation to printers?
What does DPI stand for in relation to printers?
Which printer type uses liquid ink sprayed through tiny nozzles onto paper?
Which printer type uses liquid ink sprayed through tiny nozzles onto paper?
What key feature of a printer indicates the number of pages it can produce in a minute?
What key feature of a printer indicates the number of pages it can produce in a minute?
Which type of printer is commonly used for multi-part forms due to its ability to print through several layers of paper?
Which type of printer is commonly used for multi-part forms due to its ability to print through several layers of paper?
'Higher DPI values mean finer, clearer prints' - this statement is related to which key feature of a printer?
'Higher DPI values mean finer, clearer prints' - this statement is related to which key feature of a printer?
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Study Notes
Input and Output Devices
- Input devices allow users to enter data into a computer and interact with it, while output devices display the processed input in a way that is easy for humans to understand.
Output Devices
- Monitor/Display Screen:
- Types of display technologies: Cathode Ray Tube (CRT), Liquid Crystal Display (LCD), and Light Emitting Diode (LED)
- Key features: Resolution (measured in pixels), Refresh Rate (measured in Hz), Response Time (measured in ms), and Aspect Ratio (width:height)
- Printer:
- Types of printers: Dot Matrix, Inkjet, and Laser
- Key features: Resolution (measured in DPI), Speed (measured in pages per minute)
- Speaker:
- Converts digital audio data into an analog signal using the Digital-to-Analog Converter (DAC) in the sound card
Input Devices
- Keyboard:
- Components: Alphanumeric keys, Function keys, Special keys, and Navigation keys
- Connectivity: USB, Ethernet, Wi-Fi, or Bluetooth
- Microphone:
- Captures and converts sound waves into an electrical signal
- Used for voice communication, recording, voice recognition, and more
- Digital Camera and Webcam:
- Both serve as imaging devices, but designed for different primary functions
- Webcam: used for video conferencing, live streaming, and online communication
- Digital Camera: used for photography and videography
- Touchscreen:
- A direct manipulation input device that allows users to interact with a digital display using touch gestures
- Scanner:
- Types: Sheet-fed and Handheld
Combined Input/Output Devices
- Modem:
- Converts digital data from a computer into an analog signal for transmission over telephone lines
- Converts incoming analog signal into a digital signal for the computer to understand and process
- Modulation: converting digital signal into analog signal
- Demodulation: converting analog signal into digital signal
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