CitiusTech Java Technical Lead interview questions

Two technical round. First round was Scheduled on Saturday 10 a.m. I waited till 10:30 No one joined . HR told Technical Panel was facing internet issue. So I need to wait. But anyway that day no one joined. They rescheduled it on Next Tuesday. Where some person from ThirdParty organization took interview and asked about some tools like Intelij , sql developer and one coding question. I answered whatever I Could. Then after one week next technical round was scheduled. The panel joined 10 mins late. Started with introduction and asked me about design patterns. At that time I was not good with design pattern. So I told him that. In reply he started laughing and said how come with 6 years of Java Experience you do not know design pattern. I was very much shocked about this line. If a interviewee is not aware of something you may not hire that person but you should not laugh at the person. Anyway then interview was followed by some other questions like units,scrum etc. Overall was not a pleasant experience with Citius Tech.