I had a phone screen from Amazon. Asked few LP principles and two easy questions.

1. I did and optimizied the first question (directly went to optimized one) (Easy question)
2. Second question, i approched with broute force, and took some time and tips from the interviewer to optimize it(actually I did this question before, but confused at that time and can't think of a optimized solution). But after the explanation from the interviewer, I figured out the way and optimized it in last minutes. (Easy question)

Later my application status changed from "Under Consideration" to "Application Submitted". So would it be a rejection or is it a usual process? I still didn't get any reply from my recuiter.

I got it from few posts that, they may require another phone screen. Any guesses?