[Year 12 IT Apps] Database size question

[Stephen Digby]

Agree.  Question needed to specify that backups or archives needed to be
stored annually and retained on the hard drive.

Just drop the x5

 

====================================================
Stephen Digby, Learning Technology Manager
mailto:  <mailto:digby.stephen.p at edumail.vic.gov.au>
digby.stephen.p at edumail.vic.gov.au  
Cheltenham Secondary College  <http://www.cheltsec.vic.edu.au>
www.cheltsec.vic.edu.au
Ph: 613 955 55 955  Fx: 9555 8617 Mb: 0431-701-028
====================================================
Brain cells come and brain cells go, but fat cells live forever. Steven
Wright 

From: itapps-bounces at edulists.com.au [mailto:itapps-bounces at edulists.com.au]
On Behalf Of Quentin Lydall
Sent: Tuesday, 14 October 2008 9:53 AM
To: itapps at edulists.com.au
Subject: [Year 12 IT Apps] Database size question

 

Hello everyone,

 

The VITTA 2008 trial exam 3 has this question in the multiple-choice
section:

 

Question 7 A database for an online marketing company keeps records of all
customers who have requested coupons and notifications of sales in their
local area. They currently have a dedicated customer base of around 5000
customers, but wish to grow this to 20,000 customers within the next 5
years. How much storage capacity will be required to store 20,000 customer
records for the entire 5 year period, given the following information: 
First Name - 50 characters 
Last Name - 50 characters 
Address - 100 characters 
Suburb - 50 characters 
Phone number - 10 characters each (2 phone numbers per customer) 
Email address - 50 characters 
Postcode - 4 characters 
Number of coupons received - 32-bit number 

 

A. 34,200,000 bytes 

 

B. 32,400,000 bytes 

 

C. 35,600,000 bytes 

 

D. 32,800,000 bytes 

 

The solution gives D with the explanation 


50+50+100+50+10+10+50+4+4 = 328 328 x 20000 x 5 = 32,800,000 

Why multiply by 5?  Would the company recreate the entire records each year?
I'd design it differently..

 

Appreciate your help.

 

Quentin Lydall

Head of ICT

Beaconhills College Valley Campus

30-34 Toomuc Valley Road,

Pakenham

3810

Phone: 1300 002 225 Extn 3016

P Please consider the environment before printing my email

 

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