A:Answer No, it is not a "smart TV," but with Chromecast built in, it does function as one. Basically the difference is smart TVs have a button on the remote where you can access apps from the TV itself (so all you need is the TV and wifi), whereas Chromecast uses apps from anything that can cast to Chromecast such as a smartphone tablet or PC with a chrome browser (so you need the TV, wifi, and a smartphone or tablet). So the app isn't in the TV like a smart TV, the app is on your phone but displays on the TV.
I actually prefer Chromecast to smart TVs (you can still use your phone while playing the movie/music with most if not all apps, so you can do things like look for the next movie to play on your phone, so that everyone looking at the TV doesn't have to see you open a menu and distract from the movie - the menu is on your phone, not the TV like with a smart TV).