I submitted my CV online, got invited and did an online aptitude test, it was quite easy. I didn't get results for it , a few days later I got rejected. I understand they keep those results for a while for use in other future applications

I had my interview about 6 weeks after submitting my application. It lasted about 30 minutes. Lots of 'tell me a time' type questions. The interviewers didn't really ask any follow-up questions on my responses - they just read the next one in line. Can't say it was a poor experience, but it certainly felt a little rushed and incoherent.