Took part in DLR screening in Hamburg in May for Lufthansa Italia. Success in aptitude tests, fail in interview, though.
This is a commercial site where the aptitude tests are explained (right frame menu):
SkyTest® - Trainingssoftware für: DLR-Test (Lufthansa, AUA, DFS), Swiss, Air Berlin, FEAST (Eurocontrol), Austro Control, Skyguide