Siemens CAPAP - Digital Industries interview questions

Multiple stages with bunch of applicants but only one opening (as informed at the last stage by the interviewing HRBP). Selection flow: 30-minute screening interview with an HR intern (lol) -> Pen-and-paper three-hour aptitude test including a company knowledge section (20+ participants per test batch — there were more than one test batch, as mentioned by the test invigilator) -> One-hour final interview with user and HRBP, excruciatingly long perhaps due to the burden of selecting out of too many candidates at the ultimate stage. Only the first screening was conducted online, the rest were held on the spot (at their Pulomas Office). In-lab swab test was made mandatory for visiting but not reimbursable. They should have paid for it. To enter the premise, all candidates were to wait at the reception building until summoned from the inside. The reception was unfitting for the large crowd (moreover, for the company's prestigious name). Not to mention, the toilet facility near the reception was very poor (one-chamber unisex squatter toilet). A glass of water was prepared on the table for each participant. They established that they have 0%-tolerant policy on plastic use in any of their company's setting. After the aptitude test, a snack box was provided to take home. Inside, there was a plastic bottle of water. Tragic. After making it to the last stage, no rejection letter was sent, making the entire process even more sour. Nonetheless, super grateful for not landing the job as it became clear that the company's working policy is 100%-work-at-office and the working atmosphere is very industrial (a huge factory in contrast with a white collar corporate skyscraper). Nothing's wrong with this last point; it just didn't fit my preference.