Do P2 prefabricated buildings usually have a rear exit?

Is it typical for a P2 to have entrances and exits at both the front and rear? I'm trying to figure out which prefabricated building series I live in, hence my question. We definitely have the P2-typical square staircase without windows, and the block isn't flush with the ground either, requiring a step, which is…

In GDR prefabricated buildings, were the lower, middle and upper building elements completely identical, so that the middle/upper ones were statically oversized?

Or that the number of floors was limited by the static load-bearing capacity of the lowest building elements?