\begin{itemize}
\item what is the difference between \hinline{let} and \hinline{where}?
\item what is the difference between \hinline{foldr} and \hinline{foldl}?
\item what is the difference between explicit and implicit recursion? Give examples
\item how many arguments does a haskell function have (strictly speaking)?
\item what do you have to keep in mind in order to make function composition work?
\item can you define \hinline{map} and \hinline{filter} in terms of \hinline{foldr}?
\item what is eta reduction (or: eta abstraction)?
\end{itemize}