Siemens Intern interview questions

I applied online, received an email after few days mentioning whether I am interested to visit the office for an on-site interview /video call. The following week I visited the office for on-site interview. And the very next week they said they are interested in hiring me as an Intern.

The entire interview process consisted of four rounds. The first was the 'CV screening'. The second was an aptitude test. The third was a technical interview - where every candidate's technical knowledge was tested. The last was the HR interview. This entire process took two days to complete.