A zone file on the DNS server has been updated. Which of the following commands will tell named to
reload its zone files? (Please select TWO correct answers)

A.
killall -HUP named

B.
killall named

C.
rndc reload

D.
rndc flush

E.
named-checkzone -r

Explanation:
From the man pages:
Signals – In routine operation, signals should not be used to control the nameserver; rndc should be
used instead.
SIGHUP Force a reload of the server. for more information on rndc see
http://www.centos.org/docs/5/html/Deployment_Guide-en-US/s1-bind-rndc.html