Opower Software Engineer interview questions

One of the recruiters contacted me through Linkedin a while ago, and i was trying to work at some established startups. The interview process started with me getting an email from the recruiter to set up a phone call. This was the initial phone call, where i was told about the company and the culture and we talked little bit about myself. I was told about the interview process which comprised of the following 1: Coding challenge with one week time frame 2 : Phone interview 3 : On site call As soon as we were done with phone call, i received my coding challenge. I took some time to complete the code and send it back. I got a email saying my code wasnt good enough and wishing me good luck for future. I wanted to get some feedback on my code, but probably it was too much to ask.

I applied for the position which was listed on Indeed.com. After a few days I was contacted by the Recruiter at Opower and she asked me time slots for a phone screening. After the phone screening she sent me an assessment test which I had to submit within 7 days. The test involved coding a problem in Java. I coded the problem and submitted it on time. After a week I contacted her saying that I had submitted the test and I wanted to know the status of the application. She replied to my email 8-10 days after the submission of my assessment and said that she will give me feedback the next day. When she again didn't give feedback I shot an email again and this time she sent me a rejection mail saying that my solution was not perfect. I felt very let down with the interview process and the extremely slow response from the recruiter. Also, for the assessment test they did not give me any feedback about my code and didn't tell me what was the problem.