Bombed AWS interview L3

Had 2 loop interviews yesterday and one today. I wasn’t able to answer some technical questions. Also on one question I answered right at first then got confused and changes my answer. It was regarding length of multimode fibre which is so i changed from 500m to 500ft. I also got couple of questions regarding fibre wrong even though I have worked with it and also had mentioned it on my cv. I feel like an idiot.