CCNA exam simulator commands

in CCNA & CCENT
Hi,
in the CCNA exam does the 'tab' complete the command input or do you have to type the whole command? Aslo does '?' command work?
in the CCNA exam does the 'tab' complete the command input or do you have to type the whole command? Aslo does '?' command work?
Comments
When I took my CCNA about 6 months ago and the tab didn't work for me but the ? did.
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