| Examination
Questions (page 331) |
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1
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Any
two from:
Controlling the temperature of an oven.
Controlling the washing programs in a washing machine/dishwasher.
Sensing when clothes are dry in a tumble drier. etc. |
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2(a)
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A
microprocessor is a single chip that contains a CPU. It is the
brain of the device and is used for control. |
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(b)
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Any
two from:
Telephones, cookers, children's toys, cameras, toasters etc. |
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(c)
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Any
three from:
Push switch/Door sensor to make sure the door is shut.
Pressure sensor to detect the amount of washing in the drum.
Water level sensor to detect that the correct amount of water
is added.
Temperature sensor to make sure that the water is not too hot
or cold. |
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3(a)
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(i) |
One
advantage from the following:
No keyboard skills are needed. Faster if the person is an inexperienced
typist.
One disadvantage from the following:
Some people's handwriting is indecipherable by humans so computers
would not be able to understand it. |
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(ii) |
An alternative input device, such as a keyboard is provided
if the pad cannot understand the person's handwriting. |
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(b)
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They
can download text they have prepared into their PC for printing.
Data can be downloaded for backup purposes/ Data can be added
to a database e.g. the orders taken by a representative that
day. |
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(c)
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(i) |
This
is a device that allows the connection of the PDA to a telephone
line so that data may be transferred to a from the PDA and other
computers. You can also send faxes and messages using e-mail
and you can also access the Internet. |
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(ii) |
The
PDA can dial a number which it has stored in it's memory, automatically.
A different tone is created for each of the different numbers
dialled. These tones can be recognised by the digital telephone
exchange. |
