You are currently in the probationary period and to date have not come to the attention of the authorities. What consequences may result if you fail to observe the traffic sign "Stop. Give way." and thereby endanger other road users?

Failing to obey the “Stop. Give way.” sign is treated as a serious right-of-way violation because you are required to come to a complete stop at the stop line (or, if there is none, before the intersection), check traffic, and only then proceed. If you ignore it and, as a result, endanger others, that is considered a safety-relevant offence.

Because you are in the probationary period (Probezeit), this kind of violation typically counts as a “serious” probationary offence. The consequence is that the authorities can order you to attend an advanced seminar for new drivers (answer 1). The idea is that beginners who commit serious violations must get additional training and reflection to reduce future risk.

In addition, such an offence leads to a registration of the offence in the Central Register of Road Traffic Offenders (answer 2). In practice, this means you receive points (depending on the exact severity) and the offence is officially recorded, which matters if further violations occur.

Resitting the theory test (answer 3) is generally not the standard consequence for a stop-sign violation during the probationary period. Theory retests are usually linked to licence issues like repeatedly failing tests, certain administrative situations, or after a withdrawal and re-application, not as a direct measure for this typical probationary offence.

Rule of thumb for similar questions: During probation, right-of-way violations that endanger others are “serious” and usually trigger mandatory measures (like an advanced seminar) plus an entry/points in the register.