This is really out of date.

* nslookup has been deprecated by its makers for years now.

* ip route's replaced 'route', which still works but won't show you all the things that ip route can.

* Nothing on dot1q VLAN tagging, which is pretty common these days

* No CDP from hosts, which is also pretty common

* No Postfix or any other non-Sendmail mailer.

* The somewhat bizarre 'bash script to validate RPM files'. Why not just teach the proper query syntax or, for scripting, RPM & yum APIs?

* Solaris.

If you're being asked these questions, or your interviewer is expecting these answers, you may wish to consider whether you want the role.