Valeo Junior Embedded Software Engineer interview questions

An okay interview process, once you pass the technical and english tests (both aren't really hard) you either do the technical interview on the same day or you leave and they arrange another day. One thing I didn't really like about the process was the waiting periods i had to go through that could be up to 45 mins. Technical interview I was asked about realtime OS and error handling in case of overload in a char, when would macros be bad

the interview process took about three weeks they informed me about the technical test and English test and then after I passed I was informed about the technical interview the technical test wasn't so easy for me, it required reading about * software engineering "configuration management and testing, also i was asked about tools of both of them " * some basic info about micro controllers like "CAN and LIN and difference between them,also the speed of them, difference between Flash and EEPROM , interrupts and isr " * C language and they focused on pointers and hard expressions to be understood, also about difference between macros and functions the english test was about some MCQs and then reading paragraph and to be asked about the paragraphs you will get a paper to write about a specific topic like your future plans I waited for the interviewer for nearly 2 hours which wasn't so good although i was on time I thought to leave the place because they didn't respect their interviewees