Is it possible to connect the new DELL 31.5-inch monitor (UP3216Q) at 3840x2160 to the new macbook pro (late 2016)?
Yes, it is possible, as the display supports DisplayPort 1.2 which is sufficient to drive 4K resolution at 60 Hz. Many vendors will sell appropriate adapters, though. I recommend you get a USB-C (or Thunderbolt 3) to DisplayPort adapter, like this one. You could also use Apple's USB-C to HDMI adapter, but that one only supports 30Hz at 4K resolutions.

The Dell has these ports:


DP, mDP, HDMI (MHL), 4 x USB3 with one charging port, 1 x USB3 upstream, Media Card Reader


Apple has a very nice article covering all the implications of USB-C and Thunderbolt including links to what displays they know work at 60 Hz and 4k resolution. You will want to read that carefully as well.


https://support.apple.com/en-us/HT207256