Having not yet taken the 2012 test, I'm going to guess you're simply going to be picking from pre-existing commands rather than having to know one well enough to write it out. Typically when working with powershell, you'll want to use Get-help (in absence of an IDE, at least) to work your way through using a particular commandlet the way you want to. In fact, on Microsoft's virtual academy there are some powershell courses where the architect behind powershell actually recommends this when he's talking about powershell as a whole in one of the videos.
That said, I'd leave it open for one of the hosts to respond and confirm.