Nest Embedded Software Engineer interview questions

HR reached out to me after I had applied online to set up a technical interview. Interview was scheduled for 45 minutes. The interviewer told me about the company and its products and what his job looked like . He then started with tell me about yourself? Then some questions with respect to my projects, some questions on C and experience followed by a coding round where I had to correct a part of code and also write a code from scratch. Both were based on pointers. I was pretty bad at pointers at that time, couldn't nail it! Got a rejection after 2 days, which was as I had expected. C questions: dangling pointer, why and where are void pointers used