TP Web Developer interview questions

They ask me about the past projects I work on, some things related to architecture , db questions or thing slike how I will test the components from a page using the browser dev tools. The guys who wer einterviewing me, weren't serious at all and they were rude. They stayed laughing during the interview without any reason. They also asked me about what salary I wanted, when the company was the one who offered me the job ,called me and offered me a specific salary the previous day, don't apply to this company it's not worth it and they are disrespectful and dishonest.