Not really. AC literally stands for alternating current, meaning the current flows the other direction in the conductors as well. That's not what happens in most DC-DC converters. Instead the current is switched on or off (or this way and that way if you prefer).
As a visualization, the hydraulic ram pump[1] is the water equivalent of a DC boost converter[2]. At no point in the cycle does the water flow in reverse. Same with the DC boost converter.