--- a/hws/hw04.tex	Mon Oct 05 05:20:07 2015 +0100
+++ b/hws/hw04.tex	Mon Oct 05 12:25:47 2015 +0100
@@ -6,6 +6,13 @@
 \section*{Homework 4}
 
 \begin{enumerate}
+\item What should the architecture of a network application under Unix
+  be that processes potentially hostile data?
+
+\item What is a unikernel system and why is a unikernel
+preferable on a web server system (in contrast to a traditional
+general purpose operating system like Linux).
+
 \item What does the principle of least privilege say?
 
 \item How can you exploit the fact that every night root has a cron