Fractal Data Science - Trail Run interview questions

I applied for the position of Data science - Trail Run. After few days I got a mail for coding test. I appeared for the test and attempted 2 out of 3 questions correctly. As mentioned, they were expecting approximate solution for one of the questions. Immediately after the test, in a half hour I got a mail that I haven't been selected for further rounds. Why is it so? They should make the hiring process transparent more transparent.