Yep, I would add also questions about
networking, routing, how to low level configure a network interface, firewalls,
storage, disks, mirroring, NAS,
remote management LOM, RSC,
Commands to monitor a system,
Solaris 10 features (Zones, Resource management, Dtrace, SMF, RBAC, ZFS).
And a killer question: "Which one do you think is the best O/S, Solaris or Linux ?"