A novel in a year?

Author Louise Doughty claims it's possible to write a novel in one year.

But when you actually get down to reading her article, that year in question is supposed to be something like a starter kit. Meaning the exercises will be in preparation to the actual writing. Which means that if you haven't really written a book before, it's going to take you around three years to finish that book.

And we're only talking about a draft.

And I'm part of a class that requires me to finish 100 pages in about, oh say, 100 days.

I'm screwed.