fearghalreilly (1/9/2013)
i went with answer B but not fully sure if it was the correct decision ....
Sorry to say that you went for the wrong option!
B) de-normalization speeds up data modifications at the expense of data retrieval
When you de-normalise the data you're going to re-introduce some form of data redundancy. Which means modification would be applied to more rows (as data is now duplicated).
On the other hand, data retrieval would be faster when accessing correctly indexed de-normalised data.
BTW, when I read this earlier today I went for option E but like the rest I chose E because I didn't feel comfortable with the other options.
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It takes a minimal capacity for rational thought to see that the corporate 'free press' is a structurally irrational and biased, and extremely violent, system of elite propaganda.
David Edwards - Media lens[/url]
Society has varying and conflicting interests; what is called objectivity is the disguise of one of these interests - that of neutrality. But neutrality is a fiction in an unneutral world. There are victims, there are executioners, and there are bystanders... and the 'objectivity' of the bystander calls for inaction while other heads fall.
Howard Zinn