How do you guys determine whether you are well prepared for any technical interview? There is so much to learn in technical field but then, how do you determine whether your interview is 100% and you can crack any interview? I am going through a "layoff" phase and I need some threshold that I can attain to surpass the courage to ace the interviews. Its been 3 years since I interviewed but I have multiple lined up. I recently failed an Amazon tech screen, the solution was out there on leetcode and I could have easily googled. But, I tried to solve the problem from scratch using my own algorithm. The interviewer was very pleased I applied "Dynamic programming" but I could not pass the interview because perhaps, it was not the ideal solution. So, my question is, how to get to the point where you are totally confident you would ace it?