Amazon Software Development Engineer, II interview questions

Technical Question: I was asked to write code on collabedit: Program to do a spiral traversal of matrix I was asked which programming language I would choose between C and C++ and why? This was followed-on by some more questions - when would you not choose C or C++? I was asked to mention my best project and describe what I liked in this project. I was then asked what was the thing you do not like in the the project you like best?

60 minutes phone tech interviews. First question is a behavior one about risk management. something like describing a case when failure of a function caused loss of customer, and how did you handle it. Followed by a coding question: a parking lot has limited lots, different numbers and fees for small/medium/large sized cars, write a code to simulate the process of a car's entering and leaving.