I have cleared first round in second round interviewer is expecting coding algorithm as per their solution. I have provided the solution but still not convinced with it at the end of interview without asking any question they got disconnected

1st technical round was machine test. One program on multithreading. Program was like Tasks(Wash, Repair, Paint), Employee(Walker, Smith, Joe) and decide the priority of tasks based on their time to complete and fee taken to complete the task. I didn't clear the test. The machine test was on core java which was not matching with JD.