Amazon Sr Developer interview questions

This was a set of three phone interviews where I was offered pop quizes on coding problems. A new grad would be more comfortable in this type of interview. It has been quite a long time since I have been quized on basic coding and algorithms. While in my current role I constantly interface with my employees, customers, management and partners I am not thrown brain teasers, but I am asked relevant questions to the technology and product suites of the company I work for. I found myself a "deer in the headlights" on very easy questions. My brain froze and I struggled to unlock it for even just a moment.