Capgemini Software Developer interview questions

I attended interview last Saturday at Capgemini (Eco Space Bangalore). interviewer asked me couple of question on REST API. In which he asked to write syntax of producer annotation so I wrote @Produces("application/json") and then He said it is not right syntax. According to him syntax should be @Produces(MediaType.APPLICATION_JSON) . He was not agree to accept that both are same (MediaType is a class and it has static property "APPLICATION_JSON" and this property value is nothing but "application/json"). At last he said to me you prepare first then come back. How Capgemini allow that type of guy to be a Interviewer who doesn't know that, to do coding there are multiple ways. Finally I came back my Home :)