LinkedIn Systems Engineer - Storage interview questions

Contacted through Linkedin via recruiter. Phone interview with 2 engineers. Called onsite. 4 one to one interview after 2 weeks. Simple questions based on scripting and OOPs. Basic networking questions. After 3 days, they sent me rejection saying my programming was not to mark. They didn't ask me any difficult programming questions. 2 questions were given which I solved impromptu and they were absolutely correct. I don't know what they were looking for as 2 interviewers asked me to ask them questions for almost an 1 hour (both combined)