Samsung Austin Semiconductor interview experience

I was interviewing with SAS and I didn’t hear back from them since 3 weeks. I got an email from recruiter that my skills doesn't match. I understand every company has different language and different internal working process. But I didn't understand how a manager can judge a person in a half an hour phone call. All we discussed was what do I do now, why I applied for the position and what does this position ask for. One question he asked me was " What is Cpk?" I told him, "its a process capability index used to understand statistical measurement of a process’s ability to produce parts within specified limits. Cpk particularly tells if your process is centered between the specification limits. His answer was "you are completely wrong". I was shocked to hear his answer.