Podcast
Questions and Answers
The ______ mode of data transmission allows for simultaneous transmission in both directions.
The ______ mode of data transmission allows for simultaneous transmission in both directions.
full-duplex
The ______ coding scheme uses 4 bits for each decimal digit.
The ______ coding scheme uses 4 bits for each decimal digit.
BCD
The ______ coding scheme is commonly used for data transfer in computers and printers.
The ______ coding scheme is commonly used for data transfer in computers and printers.
parallel
The ______ mode of data transmission is similar to a one-way street.
The ______ mode of data transmission is similar to a one-way street.
A phone conversation is an example of ______ data transmission.
A phone conversation is an example of ______ data transmission.
The coding scheme ______ uses 8 bits for each character.
The coding scheme ______ uses 8 bits for each character.
The earliest computers used the ______ coding scheme.
The earliest computers used the ______ coding scheme.
Color CRT monitors use three ______ generating red, green, and blue (RGB) colors.
Color CRT monitors use three ______ generating red, green, and blue (RGB) colors.
The ______ coding scheme uses 16 bits for each character.
The ______ coding scheme uses 16 bits for each character.
Flat panel displays take less space, are ______, and consume less power.
Flat panel displays take less space, are ______, and consume less power.
Liquid Crystal Display (LCD) uses liquid crystals to ______ or allow light.
Liquid Crystal Display (LCD) uses liquid crystals to ______ or allow light.
Electroluminescent Display (ELD) uses a substance that glows when charged by electric ______.
Electroluminescent Display (ELD) uses a substance that glows when charged by electric ______.
A printer is an ______ device that prints characters, symbols, and graphics on paper.
A printer is an ______ device that prints characters, symbols, and graphics on paper.
Print quality depends on resolution measured in ______ or dpi.
Print quality depends on resolution measured in ______ or dpi.
Impact printers work like a ______; printing by striking a print hammer against an inked ribbon.
Impact printers work like a ______; printing by striking a print hammer against an inked ribbon.
Non-impact printers are faster and quieter than impact printers, but ______ and with better print quality.
Non-impact printers are faster and quieter than impact printers, but ______ and with better print quality.
The data that has been processed into useful information is called ______.
The data that has been processed into useful information is called ______.
Softcopy output is ______ in form and stored on storage devices.
Softcopy output is ______ in form and stored on storage devices.
Hardcopy output is ______ and printed on paper.
Hardcopy output is ______ and printed on paper.
The hardware components that receive information from the computer are called ______ devices.
The hardware components that receive information from the computer are called ______ devices.
The size of a display screen is measured ______.
The size of a display screen is measured ______.
Display screens can be either monochrome or ______.
Display screens can be either monochrome or ______.
The number of pixels displayed on the screen is called screen ______.
The number of pixels displayed on the screen is called screen ______.
An older type of display screen resembling a television is called a ______ monitor.
An older type of display screen resembling a television is called a ______ monitor.
ISPs and cable TV operators use ______ for high-speed data transmission.
ISPs and cable TV operators use ______ for high-speed data transmission.
Microwave communication uses ______ for high-speed transmission.
Microwave communication uses ______ for high-speed transmission.
A laser printer uses ______ beams and toner to create images on a page.
A laser printer uses ______ beams and toner to create images on a page.
Satellites are positioned about ______ miles above the earth.
Satellites are positioned about ______ miles above the earth.
An inkjet printer sprays tiny ______ drops onto paper to produce images.
An inkjet printer sprays tiny ______ drops onto paper to produce images.
In data processing, the output follows the ______ phase.
In data processing, the output follows the ______ phase.
Software is a set of ______ given to the computer.
Software is a set of ______ given to the computer.
Thermal printers produce images using heat and color ______ on special paper.
Thermal printers produce images using heat and color ______ on special paper.
The ______ is responsible for processing data in a computer system.
The ______ is responsible for processing data in a computer system.
A plotter is commonly used for printing high-quality ______ in various colors.
A plotter is commonly used for printing high-quality ______ in various colors.
Input devices like a keyboard and mouse are used to input ______ into the computer.
Input devices like a keyboard and mouse are used to input ______ into the computer.
Computers store data in binary numbers, which consist of 0s and ______.
Computers store data in binary numbers, which consist of 0s and ______.
Output devices display the results of data ______.
Output devices display the results of data ______.
Asynchronous transmission is ______ by character, meaning the time interval between characters isn't consistent.
Asynchronous transmission is ______ by character, meaning the time interval between characters isn't consistent.
Synchronous transmission is ______ than asynchronous and ensures consistent intervals between characters.
Synchronous transmission is ______ than asynchronous and ensures consistent intervals between characters.
Bandwidth is defined as the amount of data that can be transferred through a communication ______ per unit of time.
Bandwidth is defined as the amount of data that can be transferred through a communication ______ per unit of time.
Baseband transmits digital signals ______ on the transmission line without modulation.
Baseband transmits digital signals ______ on the transmission line without modulation.
Broadband enables the transmission of large amounts of data, such as ______ and video, over long distances.
Broadband enables the transmission of large amounts of data, such as ______ and video, over long distances.
Twisted pair cables are ______ and easy to install, making them useful for short-distance transfers.
Twisted pair cables are ______ and easy to install, making them useful for short-distance transfers.
Fiber optic cables transmit data as ______ of light through glass tubes.
Fiber optic cables transmit data as ______ of light through glass tubes.
Coaxial cables have a copper mesh that protects data signals from ______ interference.
Coaxial cables have a copper mesh that protects data signals from ______ interference.
Flashcards
Laser Printer
Laser Printer
A printer that uses laser beams and toner to create images on a page, printing a whole page at a time. Often used in businesses due to its speed and quality.
Inkjet Printer
Inkjet Printer
A type of printer that uses tiny ink drops sprayed onto paper to create images. It's known for producing good quality color and black and white prints, including photos.
Thermal Printer
Thermal Printer
A printer that uses heat and colored waxes to create images on special paper. It produces high-quality color prints but is expensive and requires specific paper.
Plotter
Plotter
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Data Encoding
Data Encoding
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What is Output?
What is Output?
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What is Softcopy?
What is Softcopy?
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What is Hardcopy?
What is Hardcopy?
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What are Output Devices?
What are Output Devices?
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What is Display Screen Size?
What is Display Screen Size?
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What is Display Screen Color?
What is Display Screen Color?
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What is Screen Resolution?
What is Screen Resolution?
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What is SVGA?
What is SVGA?
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LCD (Liquid Crystal Display)
LCD (Liquid Crystal Display)
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ELD (Electroluminescent Display)
ELD (Electroluminescent Display)
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Gas Plasma Display
Gas Plasma Display
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Impact Printer
Impact Printer
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Dot Matrix Printer
Dot Matrix Printer
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Data
Data
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Daisy Wheel Printer
Daisy Wheel Printer
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Line Printer
Line Printer
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Information
Information
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Non-Impact Printer
Non-Impact Printer
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Data Processing
Data Processing
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Software
Software
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Hardware
Hardware
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Input Devices
Input Devices
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CPU (Central Processing Unit)
CPU (Central Processing Unit)
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Main Memory (RAM)
Main Memory (RAM)
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Asynchronous Transmission
Asynchronous Transmission
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Synchronous Transmission
Synchronous Transmission
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Bandwidth
Bandwidth
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Baseband
Baseband
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Broadband
Broadband
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Guided Media
Guided Media
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Unguided Media
Unguided Media
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Coaxial Cable
Coaxial Cable
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BCD (Binary Coded Decimal)
BCD (Binary Coded Decimal)
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EBCDIC (Extended Binary Coded Decimal Interchange Code)
EBCDIC (Extended Binary Coded Decimal Interchange Code)
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ASCII (American Standard Code for Information Interchange)
ASCII (American Standard Code for Information Interchange)
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Unicode
Unicode
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Simplex Mode
Simplex Mode
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Half-Duplex Mode
Half-Duplex Mode
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Full-Duplex Mode
Full-Duplex Mode
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Parallel Transmission
Parallel Transmission
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Serial Transmission
Serial Transmission
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Study Notes
Output Data
- Data processed into useful information is called output.
- Output can be text, graphics, audio, or video.
Types of Output
- Softcopy: Output displayed on a screen.
- Not tangible.
- Easy to modify.
- Inexpensive to duplicate.
- Easily transferable electronically.
- Hardcopy: Printed output on paper.
- Tangible.
- Difficult to modify.
- Tangible.
- Printed on paper.
- Costly to duplicate.
- Transferable physically.
Output Devices
- Hardware components that receive information from a computer.
- Convert computer information to a user-understandable format.
- Examples: monitors, printers, plotters, speakers.
Display Screen Features
- Size: Measured diagonally.
- Desktop monitors range from 17 to 30 inches.
- Laptop screens typically 14 to 17 inches.
- Tablet screens are 7-10 inches.
- Color: Can be monochrome (single color) or color.
- Color displays use RGB (Red, Green, Blue) to create colors.
- Monochrome displays show shades of a single color.
- Resolution: Number of pixels (dots) displayed on the screen.
- Higher pixel counts result in sharper images.
Video Display Adapters
- VGA (Video Graphics Array): Uses 4-bit color, supports 16-256 colors.
- SVGA (Super Video Graphics Array): Uses 8-bit color, supports 256 colors at higher resolution than VGA.
- XGA (Extended Graphics Array): Uses 24-bit color ("true color"), supports up to 16.7 million colors.
Types of Display Screens
- CRT Monitor: Older display technology; large, heavy, bulky, and emits harmful radiation. Uses a Cathode Ray Tube.
- Flat Panel Displays: Modern displays.
- Less space, lightweight, consume less power.
- More expensive than CRTs.
- Liquid Crystal Display (LCD): Uses liquid crystals.
- Electroluminescent Display (ELD): Uses a light-emitting substance.
- Gas Plasma Display: Uses gas that emits light with electric current.
Printers
- Output devices printing characters, symbols, graphics on paper.
- Quality depends on resolution (dots per inch - DPI).
- Impact Printers: Strike an inked ribbon against the paper (like a typewriter).
- Examples: Dot Matrix, Daisy Wheel, Line Printers.
- Non-Impact Printers: No physical contact with the paper.
- Examples: Laser, Inkjet, Thermal
Dot Matrix Printers
- Tiny pins on a print head strike an inked ribbon to create dots.
- Output isn't high-quality and is noisy.
- Speed measured in characters per second (cps).
Daisy Wheel Printers
- A wheel with characters on petals.
- A hammer strikes a petal against the ribbon for printing.
Line Printers
- Print entire lines at a time.
- Speed measured in lines per minute (lpm).
Laser Printers
- Use laser beams and toner to create images on paper.
- Print complete pages at a time.
- Higher print quality and faster than many other printer types.
- Speed measured in pages per minute (ppm).
Inkjet Printers
- Spray tiny ink drops onto paper.
- Quality text and graphics, including color photos.
- Typically lower cost than laser printers.
- Printing speed is measured in pages per minute (ppm).
Thermal Printers
- Use heat and color waxes to produce images on special paper.
- Requires special paper and can be expensive.
- High-quality color printing.
Plotters
- Used to print high-quality graphics, maps, posters.
Data Encoding
- Computers use binary numbers (0s and 1s) to store data.
- Encoding converts data into binary form.
- Several coding schemes exist.
Types of Coding Schemes
- BCD: Binary Coded Decimal; each decimal digit is represented by 4 bits.
- EBCDIC: Extended Binary Coded Decimal Interchange Code; 8-bit code.
- ASCII: American Standard Code for Information Interchange; 7-bit (128 characters), extended 8-bit (256 characters).
- Unicode: 16-bit code (65,536 characters).
Data Transmission Modes
- Simplex: Data flows in one direction (e.g., TV broadcast).
- Half-Duplex: Data flows in both directions, but not simultaneously (e.g., internet surfing).
- Full-Duplex: Data flows in both directions simultaneously (e.g., telephone conversation).
Types of Data Transmission
- Parallel: Multiple bits sent simultaneously.
- Serial: Bits sent sequentially, one at a time.
Asynchronous Transmission
- Transmits characters one at a time.
- Time intervals between characters are not consistent.
- Uses start and stop bits to mark the beginning and end of each character.
Synchronous Transmission
- Transmits blocks of data.
- Time intervals between characters are consistent.
- Faster than asynchronous transmission.
Bandwidth and Communication Channels
- Bandwidth is the amount of data transferred per unit of time.
- Communication channels are paths for data transmission.
Guided Media
- Devices are connected using physical media like wires.
- Twisted Pair: Inexpensive, short distance.
- Coaxial Cable: Copper wire covered by insulating material.
- Fiber Optic: Uses light signals.
Unguided Media
- Devices communicate through air or space.
- Microwave: Line-of-sight transmission, susceptible to interference.
- Satellite: Wireless communication over long distances.
- Mobile: Radio-based network for data transmission.
Communication Satellites
- Used for long-distance, wireless communication.
- Located in space.
- Can transmit large amounts of data.
Mobile Communication
- Radio-based networks for transmitting data to and from mobile devices.
- Widely used globally.
Computer Systems Fundamentals
- Data: Raw, unprocessed facts and figures.
- Information: Processed data, organized and meaningful.
- Data Processing: Converting data into information.
- Input → Processing → Output
Software and Hardware
- Software: Set of instructions (programs) given to the computer.
- Hardware: Physical components.
Primary Components of a Computer System
(List of components and their basic functions)
Types of Software
- System Software: Programs that control and manage hardware (Operating Systems, utility programs, device drivers).
- Application Software: Used for specific tasks (customized software, package software).
Operating Systems
- Set of programs that manages computer components and operations.
- Acts as an interface between the user and hardware.
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Description
This quiz tests your knowledge on the types of output devices, including softcopy and hardcopy, as well as their features. You'll explore different output formats and understand how hardware components convert information into user-understandable formats. Ideal for students studying computer science concepts.
