IBM Data Scientist interview questions

It was an online assessment, where they ask technical quetsions first, then they will give you an online coding challenge, the coding was impossible, they want you to incorporate machine learning with java, and somehow test the machine learning algorithm performance, what got me the most, is I did not know how to read the value's they gave you, I did not prepare very well

It's an online interview. I was asked to record or type my answer. There were coding questions, too. The coding question is not hard. After the interview, I checked the job description website but the job description was not available saying this job was expired or the position was full. I got a reply within a week.