Crayon Data Software Developer interview questions

The Interview went for about 30 minutes.It's held in Microsoft teams and the interview was technical.First,the interviewer asked me to tell about myself and next section is the coding part where two codes were given,screen share should be done and the code has to be compiled and executed in any online compiler or Dev c++.

I was interviewed for spark developer role. But the interviewer was mainly focussed on Java. Asked me to write few Java programs which is no where related to big data solution. He was asking questions on rdd, mapreduce. He didn't even know about datasets or dataframes. He didn't even know performance tuning is the core part of spark programming. Even when I tried to explain he didn't show any interest. Please ask the person who is expert in the skill set of hiring technology to interview