SAP Software Engineer Developer interview questions

it was a phone interview of length 1 hour. my interview partener introduced himself and his position and what he is doing at sap. then he asked me to give quick report about my experience with programming and the programs I did. Mainly my masters thesis. Then he asked me to implement function in c++ that takes two arrays as input, one containing numbers and the other one containing strings. the function should then calculated the average of numbers at positions i where the set of i was defined in terms of a condition that the the strings in the array had to fullfill.

I went through campus placement. It was gruelling. I dont think the hiring team takes into consideration that the applicants are only human beings. Every round is delayed. I went for the interview at 8am and came out at 8.30pm. The only answer i got was not suitable. No elaboration.