yes there are lots of hits and most peddling old tests/info (pre 2012) this would be fine if they are gratis but often they are not.
The 'nuggets' thing is a .exe affair.
The official lpic site suggests you can use 'praxis', this is now defunct- at least from the UK- so why include it? The 'Penguin Tutor' at the same site seems to be pitched at 'Linux Essentials' and so of little use.
The IBM developer-works stuff is much better but hard to tell which are spaces and which are not, still not a mock exam.
The man pages are great but you still have to join the dots and how do you know what went wrong?