Cognizant Android Applications Developer interview questions

I had a technical interview that lasted at least 30 minutes, during which I also wrote a program. Instead of using an iterator, I used a for loop. However, the interviewer asked me to use the iterate method. At that moment, I forgot about the hasNext method. Despite this, I answered all the other questions correctly. Unfortunately, I haven't received any updates from their side. I even emailed the person who scheduled my interview, but there has been no response.