If you can see this check that
There are two main ways for starting services, INIT and XINET. Choose the TRUE statement.
|A.||INIT starts services on demand, and therefore is more efficient than
the runlevel based XINET system.
|B.||INIT can be hard to debug, as services it controls may not be visible in
the process table until a client tries to connect to that service.
|C.||XINET starts services on demand, so is less efficient in resource usage
|D.||INIT services are either executed at a particular runlevel if the script file
exists, or it is simply not running at that runlevel.
|E.||XINET works out what services are running using /etc/init.d.
XINET runs services on demand, INIT runs them at a particular runlevel.
This is the main issue agains XINET.
XINET is much MORE efficient because it starts services on demand, not less efficient.
INIT and the runlevels use init.d. XINET uses /etc/xinetd