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Physical Features of a Computer System
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What is the function of a QR code scanner?
It reads data in the form of matrix or pattern of dots.
What is a barcode reader?
It is an optical machine which reads data in the form of vertical lines.
What is an SMPS?
It is a transformer that converts AC to DC
State one function of Modem.
It is used to transfer information over telephone lines.
ROM stores instructions to ________ the computer and load the ____________ system.
boot, operating
A Demodulator converts the data from ___________ to ____________ signals.
analog to digital
A Motherboard is etched with tiny _____________ _____________ called buses.
electronic circuits
A ______________ within the mouse detects the _______________ of the ball.
sensor, motion
A memory card is also called electronic __________ memory.
flash
The result of the processing done by the CPU is always stored in _________
RAM
In drum plotters, the pen is mounted on a __________ , which moves across the width of the paper.
carriage
An inkjet sprays ______________ ink.
ionized
What is the full form of RAM.
Random Access Memory
State the full form of LED.
Light Emitting Diode
State the full form of TFT.
Thin film transistor
State the full form of SMPS.
Switched Mode Power Supply
State two drawbacks of plotters.
They are slow and occupy a large space.
Why do architects and product designers use plotters?
To plat building maps or product designs.
Why is LED technology better?
It displays true colour quality and high definition videos.
Why are CRT monitors not used today?
They were bulky and used a lot of electricity.
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