X Software Developer interview questions

Applied online. Online coding challenge in hackerrank. Really easy. Got a mail regarding phone interview, scheduled a date. The interviewer was extremely friendly. Asked a few questions from my resume, Memory in C and about some of the projects that I did. The next half was a coding challenge. The first question was something that I had seen earlier and hence I explained the logic and he provided me with a different question. Implemented a satisfactory solution. Will be contacted regarding next steps.