What is the function of the Tab key on the Cisco Nexus Operating System command-line
interface?

A.
redisplays the current command line

B.
deletes all characters from the cursor to the end of the command line

C.
clears the terminal screen

D.
completes a partially entered command if enough characters are present

E.
moves the cursor one word to the right

Explanation:
“Completes the word for you after entering the first characters of the word, and then pressing the
Tab key. All options that match are presented.”
http://www.cisco.com/en/US/docs/switches/datacenter/sw/4_1/nxos/fundamentals/configuration/guide/Cisco_Nexus_7000_Series_NXOS_Fundamentals_Configuration_Guide__Release_4.1_chapter4.html