What was your most challenging assignment at your last position?
The interviewer wants to know how you overcome challenges and obstacles in the workplace. They will find it helpful if you can provide enough context for the assignment that explains how you successfully accomplished it.
If possible, pick an assignment that is applicable to the position you are interviewing for. If you are new to the industry, or if this is your first position, you can use a school assignment as an example.
"In my last position, we switched to a new legal research system about four months after I started. We had a rush issue come in with one of our clients right after the switch. The attorney needed cases pulled from the new system, but I was struggling moving so quickly because I was still learning how to operate it. Thankfully, I was able to ask a co-worker for some additional support and we were able to obtain all the needed documents in the designated time."