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IGCSE ICT chapter 2_ Input and output devices with complete solution
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IGCSE ICT chapter 2_ Input and output devices
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IGCSEICT
chapter
2:
Input
and
output
devices
Manual
input
devices
-
correct
answer-Devices
that
require
human
intervention
to
enter
data
Direct
input
devices
(Direct
data
entry)
-
correct
answer-Data
is
entered
directly
without
human
intervention.
Usually
when
large
amounts
of
similar
data
need
to
be
entered
Optical
Mark
Recognition
(OMR)
-
correct
answer-Uses
optical
mark
reader
to
detect
marks
made
in
certain
places
on
specially
printed
forms.
Usually
when
imputting
data
from
answer
sheets
or
registration
forms
Magnetic
ink
character
recognition
(MICR)
-
correct
answer-Uses
a
magnectic
ink
character
reader
to
input
characters
that
have
been
printed
in
special
magnetic
ink.
Usually
used
to
process
bank
cheques
Optical
Characters
Recognition
(OCR)
-
correct
answer-Use
a
scanner
and
software
to
convert
text
or
embedded
images
into
a
format
that
can
be
edited
by
a
word
process.
Usually
when
reading
typed
postcodes
Bar
Codes
-
correct
answer-A
set
of
lines
of
different
thicknesses
that
represent
a
number.
It
is
read
using
a
bar
code
reading
by
shining
a
beam
of
light
on
the
lines
and
detecting
the
amount
of
light
that
reflected
back.
Magnetic
Stripe
Readers
-
correct
answer-Used
to
read
magnetic
stripe
which
is
a
thin
band
of
magnetic
tape
found
on
the
back
of
credit,
debit
card,
identity
cards
and
electronic
key
cards
which
can
store
data.
Chip-and-PIN
Readers
-
correct
answer-A
chip
on
credit/debit
cards
to
make
them
more
difficult
for
hackers
to
read.
Sensors
-
correct
answer-Used
to
input
data
based
on
temperature,
light
levels,
pressure,
...
Analogue-to-digital
converter
-
correct
answer-Used
to
convert
analogue
data
to
digital
data
that
the
computer
can
understand
Data
logging
-
correct
answer-Automatically
collects
data
over
a
period
of
time
without
the
need
of
human
intervention.
Usually
used
for
weather
monitoring,
scientific
experiments
Monitors
(CRT
and
TFT)
-
correct
answer-An
output
device
that
display
text,
graphics
and
video
Dot
Matrix
Printers
-
correct
answer-Use
a
set
of
pins
to
press
an
inked
ribbon
against
the
paper
to
create
colored
dots.
The
dots'
patterns
can
be
controlled.
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