Bluetopaz99 yes it is. DS' school got an email at the same time as us telling them about the interview too.
grebnew, thanks for the direction. I've now seen the 2018 thread and it has got some helpful info in it. Looks like it will be getting DS to go through the questions he struggled with and seeing if he understands them with a bit more time. Identifying the areas to work on will be tough. DS is struggling to remember the exam.....wonderful.