X Intern interview questions

I applied online and was contacted by a recruiter. It starts with a coding challenge. 60 mins - 2 questions. Pretty simple. This is followed by a phone interview. The phone interviews are comparatively hard.

I had to do a timed hackerrank coding challenge as the first screen. On that site you need to know stdin and stdout which I hadn't heard of before so I spent most of the time figuring out how that was supposed to work. In fact I didn't mange to get it past the automatic tests somehow.