Uber Mapping Software Engineer interview questions

A general phone screen asking for background. The thing is, I really don't like the question:"How many lines of code have you written in C++ without any libraries?". This is really a meaningless question to ask because it represents nothing. Idiots can also write millions of lines of code without further understanding of the language, but any use? Then few days later came the favorite technical interview. Most questions are basic about the C++ language itself, I do have answers to all of them however I think I did not make the answer into a deeper level and that's really my fault. Worst thing, I failed the algorithm design question because he really pushed me to answer quickly while I did not quite get the question. But overall good because he actually wanted to help me.