Observation, Mirrors and Blind-Spot Checks
Observation is the skill examiners weight most heavily, because most serious crashes begin with something the driver did not see. Build a scanning routine: far ahead, mid-distance, near, then instruments - repeatedly - rather than staring at the car in front. Use the interior mirror frequently, and the exterior mirrors before any change of direction or speed.
Mirrors have blind spots. The interior mirror does not show the areas beside the rear quarters; exterior mirrors leave a gap between the edge of the mirror view and your peripheral vision. Before moving off, changing lanes, overtaking, turning across traffic, opening a door or reversing, turn your head to check the blind spot over the relevant shoulder. Questions often trap candidates by describing a mirror check alone as sufficient - it is not.
Observation also means looking for what other road users are about to do: a pedestrian turning toward the kerb, a car edging out of a side road, a motorcyclist in the gap between lanes. In Angola, expect pedestrians, informal vendors and motorcycles (motos) close to the carriageway; scan for them early and give them room.
Worked example: you intend to overtake a slower vehicle. Sequence: mirror, signal, mirror again, blind-spot check over your right shoulder, move out only when clear, pass with a safe margin, mirror, blind-spot check left, return. If any check reveals a hazard, abandon the manoeuvre and start again.