Napier Healthcare Java Developer Experienced interview questions

I got a call from consultancy they told to reach the napier office by 11:00 am.I went there by the same time.And I waited for almost 1 hr to call me to the interview cabin and I waited again for almost 1 hr and then the interviewer came, now this is the highlight thing,the guy asked me only 1 question on spring and I couldn't answer,he said "you can leave for the day,we are looking for people who are strong in spring".While I was leaving the cabin,also told "don't tell the question to others" which he asked earlier....And I laughed whole day though I didn't clear the interview..