Right-of-Way, Intersections and Roundabouts
Right-of-way questions test whether you can apply a consistent priority logic rather than guess. At an uncontrolled intersection, the general principle in Angola and most Portuguese-influenced systems is that traffic on the main road has priority, and where roads are equal you give way to traffic approaching from your right. A stop sign or line means you must stop and then give way; a give-way sign means slow, look and yield without necessarily stopping.
When turning, yield to oncoming traffic if you are turning across it (turning right across the opposing lane in right-hand traffic), and yield to pedestrians crossing the road you are entering. Emerging from a side road, driveway or petrol station, you give way to everything already on the main road.
Roundabouts: give way to traffic already circulating, approaching from your left in right-hand-drive, left-hand-traffic flow. Signal to leave, position correctly for your exit, and do not change lanes on the circle without checking. Questions often describe a driver entering a roundabout and expecting circulating traffic to stop - the trap is that entering traffic yields.
Worked example: you reach a four-way intersection with no signs and no lights. Another car approaches from your right at the same time. You give way to it, because on equal roads priority goes to the right. If instead it approaches from your left, you may proceed, but only after confirming it is actually yielding.