As these are all intra-Schengen flights, there won’t be any passport control operations. Depending on the specifics, you may have to go through security.
If you book the two legs on a single ticket, then this means the airline thinks there is enough time to make the connection, and they should take care of you if a delay in the first leg makes you miss the second flight (rebook you on the next available flight, possibly pay for a meal or even a hotel if you have to stay overnight...).
If the two legs are booked separately, then you are on your own. If you have checked luggage, you must have dropped your luggage before the check-in deadline of the second flight, which is usually anywhere from 30 to 60 minutes depending on the airport and airline. This means those connections are either completely or virtually impossible. If you miss your second flight, you will be considered a no show, and in most cases your booking and all subsequent flights on the same ticket will be cancelled, so you’ll have to rebook at your own cost.
Note that some low cost airlines never sell connecting flights, even if you order multiple flights in the same order they will be considered separate bookings.