[Year 12 SofDev] Exam - Section C - Discussion

[Adrian Janson]

Agree.

 

GB is definitely Gigabytes and Gb is definitely Gigabits.  The context does
inform the unit though - for example, even though in SBQ4 it does say '4 Gb
RAM' - you would not be talking about 'bits' in the context of RAM.
Likewise in SCQ3 - '40 Mb' for a file size - would be Megabytes as opposed
to Megabits.  Although it is probably easier for us to be comfortable with
errors like this and less so for students who are a little unsure (and wary
of trick - or "tricky" questions).

 

Cheers,

Adrian

 

From: sofdev-bounces at edulists.com.au [mailto:sofdev-bounces at edulists.com.au]
On Behalf Of Matheson, Heath A
Sent: Friday, 13 November 2009 1:20 PM
To: sofdev at edulists.com.au
Subject: [Year 12 SofDev] Exam - Section C - Discussion

 

No surprises in the exam which is nice.

 

One confusing point was the use of Gb for Gigabytes of the hard drive and
RAM (both in section B and C) and kbps for presumably kilobits. I am sure it
should be a capital B for bytes and a small b for bits. This confused some
of my students (although I think they made the correct decisions). Perhaps
this ambiguity needs to be taken into account by the examiners for section C
question 4 and 5. 

 

>From the sometimes unreliable (but quick to access) Wikipedia:

"The gigabyte is an SI <http://en.wikipedia.org/wiki/SI_prefix> -multiple of
the unit byte <http://en.wikipedia.org/wiki/Byte>  for digital information
storage <http://en.wikipedia.org/wiki/Computer_data_storage> . The prefix
giga <http://en.wikipedia.org/wiki/Giga->  means 109, therefore 1 gigabyte
is 1000000000bytes. The unit symbol for the gigabyte is GB or Gbyte, but not
Gb (lower case b) which is used for the gigabit
<http://en.wikipedia.org/wiki/Gigabit> ."

 

Heath Matheson

Mount Beauty Secondary College

Ph (03) 5754 4005

 

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