Ericsson Core Java Developer interview questions

very bad experience, din't Expected this from Ericsson, they gave job description as core Java developer, and interview questions were like my total experience is of telecom domain. first they asked me to wait, after half hr HR came and escorted us, after 4 hr long wait,I was called for interview, I would say the mental state of interviewer was to Finnish it ASAP by that time. he directly started asking questions from telecom without even having look on my resume-experience,etc. by seeing below question it's not at all looking like it was for a Java developer. No Java,No Projects, No Technology I have worked on,I suggest them to schedule for those many whom you can entertain, do not waste your & candidates time by calling every profile you gets.