Chapter 1 - Introduction to Computer System (Part 4- Output Devices)
1. What is an output device?
An output device shows or gives the
result of computer processing.
Examples: Monitor, Printer
2. What are output devices, and why are
they essential in a computer system? Explain with examples.
Output devices display or produce the results of computer processes.
Monitor: Shows images and text.
Printer: Prints documents on paper.
They are essential because they allow users to see and use the results of their
work. Without them, users wouldn’t know what the computer has done.
3.
Hardcopy and
softcopy output
|
Hardcopy |
Softcopy |
|
The
medium for hardcopy is paper or other physical materials |
Softcopy
is an electronic display or storage. |
|
Hardcopy
is not editable once printed |
softcopy
can be edited easily |
|
Hardcopy
is physically portable |
softcopy
is transferable digitally through email, cloud, or USB. |
|
Devices
used for hardcopy include printers and plotters |
Devices
used for softcopy uses monitors, speakers, or projectors. |
|
Examples
of hardcopy are printed books and reports |
examples
include e-books, PDFs, and videos. |
4.
Types of Printer
|
Laser
Printer: |
Inkjet
Printer: |
Dot
Matrix Printer: |
3D
Printer: |
|
Uses
a laser beam and toner powder to produce high-speed, high-quality prints.
Common in offices for text documents |
Sprays
tiny droplets of liquid ink onto paper. Ideal for color printing and photos. |
Uses
pins to strike an ink ribbon and form characters as dots. Noisy and low
resolution, but useful for multi-part forms. |
Creates
physical 3D objects by layering material (like plastic). Used in design,
prototyping, and manufacturing. |
|
Used
in Offices & businesses: For fast,
high-volume printing (reports, memos, invoices). Schools & libraries: For clean
black-and-white or color document printing. Home offices: When speed and sharp
text are needed. |
Used
in Homes: For occasional printing,
schoolwork, and photos. Photo studios: For high-quality
color photo prints. Small offices: Where moderate color
printing is required. |
Used
in Banks: For printing cheaque book,
statements. Warehouses & logistics: To print
multi-part shipping forms. Government offices: For continuous
feed paper printing and duplicates. |
Used
in Engineering & design: For
creating prototypes and models. Medical field: To print custom
prosthetics, dental items, and models. |
5.
Ports
USB Cable (Universal Serial Bus)
- Used to connect devices like keyboards, mice, printers,
and phones to a computer.
- Transfers data and provides power.
HDMI (High-Definition Multimedia Interface)
- Used to transmit high-quality video and audio from
devices like computers or game consoles to displays like TVs or monitors.
VGA (Video Graphics Array)
- An older type of cable used to send video signals from
a computer to a monitor or projector.
- Only carries video, not audio.
Ethernet Cable
- Connects computers to networks (like the internet).
- Provides a stable and fast wired internet connection.
Audio Port (3.5mm Jack or Audio
Jack)
- A small round port used to connect headphones,
microphones, or speakers.
- Transfers analog audio signals.
- Commonly found on phones, laptops, and computers.