Sysadmin Mathematics 2009 half-yearly exam

Published August 14th, 2009 by Barney Desmond

Part A

Use a fresh answer book for this part. Show all working-out with your answers. Approved graphing calculators may be used.

It is 4am on a Friday morning and Eirin has been woken by an SMS from the emergency support line. A colocation customer’s server is offline, and she needs to visit the datacentre. Due to sleep-deprivation and/or ethanol intoxication, Eirin is unable to find the lightswitch, but needs to throw on some clothes and get there ASAP.

Her wardrobe contains three skirts {black,black,red}, four tops {purple,blue,black,black} and two pairs of comfortable shoes {black heels,black sneakers}. Each piece of clothing is chosen at random.

  1. How many distinct outfits does Eirin have available?
  2. What is the probability that Eirin will have a coordinated outfit?
  3. How much easier is it to just pick up whatever’s lying on the floor from last night?
  4. Will it be faster for her to put her hair in a single french braid, or twintails?
  5. What is the probability that the colocation customer has done something totally silly, like changing their firewall configuration and subsequently looking themselves out in the process?
  6. How much will Anchor charge the customer for this out-of-hours callout?
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Geek Fashion 2009

Published January 30th, 2009 by oliver

Following up on a historical article from many moons ago, it is high time we did a geek fashion review for the summer

season! Linux.conf.au 2009 is now over and provided many examples of the good, the bad and the very, very ugly.

I hereby present my theory on geek fashion. Three unbreakable tenets of clothing are held dear to the hearts of every geek: 1. Comfort, 2. Utility, 3. Economy. Every article of clothing must adhere to at least one of these rules, and the more the better.

On the left we have a clear example of all three tenets. That hawaiian-style shirt is loose, breezy and definitely comfort incarnate! The cargo pants flow elegantly over the legs and have many pockets for storage (the very element of utility), while the no-name brand running shoes are easy on the budget.

And the pony-tail? Well, that’s just for the ladies.

Meanwhile, on the right we see an example of the (in)famous linux.conf.au 2007 bucket hat. One size fits none, this inelegant and ill-fitting accessory mocks the very head on top of which it sits. Many die-hard Linux afficionados still persevere with it in the vain attempt to shield their pasty complexion from the sun, even though it is clear it casts almost no shadow on the face at all.

On the left we have a person who we affectionately named “the cowboy” for the first couple of days of the conference. We later found out that this is none other than Rob Savoye, reknowned GCC hacker, award-winning NASA contractor amongst his many other conquests. Rob has got the fashion thing all figured out.

The entire outfit just screams “I’m in comfort city”. The leather hat and waistcoat (and arguably beard) keep the weather at bay. Rob has confessed to only needing to buy a new pair of jeans every decade or so, so we know he is playing it smart in this tough economic environment. Good on ya Rob!

Of course, there are always exceptions to the rule such as this young man in the photo to the right. He has decided the presentation he is giving needs to commands attention from even the lowliest of geeks. The Star Trek uniform and communicator emblem state unequivocally that he means business!

Sadly, that just about wraps up this edition of Geek Fashion Review. Perhaps it was the Hobart weather, perhaps we geeks are not as adventurous and willing to push the fashion envelope anymore, but the vast majority of the offerings this year were a combination of t-shirts or polo shirts with jeans or cargo shorts. Running shoes or skate shoes are definitely in.

I look forward to LCA2010 in Wellington, and the fashion offerings it will present.

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