What's the position on helping someone with understanding technology, but in response to learning or education rather than a formal 'I have a specific issue ....'

I'm thinking of this question,

https://serverfault.com/questions/393467/transaction-log-backups

> I'm studying for the 70-432 (SQL Server 2008) exam, and I'm a bit
> confused about how the transaction log works.
> 
> From what I understand, (correct me if I'm wrong...) the log is
> actively stored in memory and copied to a file on the drive as often
> as possible. At every checkpoint, complete transactions are committed
> to the data file on the hard drive (that is, they're not actually
> written to the drive at all until the checkpoint. And the tail always
> holds the transactions that have not been committed yet.

It's specific, focussed and quite narrow, so it might well get a good answer, but it's not a real problem faced by the person in the true meaning of the phrase.