My Nexus 7 came with neither and I don't temember seeing either on the HTC one of our kids had having either. She's since moved to an iPhone, which of course has neither. Is it a Samsung thing perhaps?

One of the first things I did on my Nexus was find a file manager (settled on ES File Explorer - it's UI is frankly awful but best of bad bunch), a terminal (Went through many! to end up with two as neither are great at both local and ssh remote) and a text editor (Ended up paying for one as the free ones were mostly rubbish, full of adverts and dubious security permissions).

I can't wait to get rid of it. It's almost entirely used for couch surfing and games now and it's a bit slow for that now due to the flash issue in the N7.