Cisco Software Developer interview questions

2 rounds in total. One tech one behavorial. Behavorial has some case questions and tech includes tech questions, one algorithm question. Algo is new version of remove all adjacent duplicates in string

Applied online and got an OA the next day at 1pm. It said that the OA needed to be completed in the next 15 days so I was thinking of completing it the next day after a little research/practice. Got an email at 3pm the same day that said they won't be moving forward?? Very confused and disappointing,