Cognizant UI Developer interview questions

got call from hr , they have schedules my interview it was a teams call, Panel didnt come to take it this has happend 2-3 times Finally i gave interview , question was very basic i have given almost all the answers but still no feedback from them Somehow i felt they are just wasting our time i

waited for 2 hrs for interviewer. The overall experience was not good. I think he was not interested to take my interview. First they call you for interview and then they shows no interest to take the interview.