That sounds like an interview question! They are trying to figure out how you think, your problem-solving skills, ability to act without direction (not having to ask the supervisor what to do), your resourcefulness, etc.
For example: I was assigned to plan an aircraft disaster exercise. I had never assisted in planning one before, nor had I ever attended one, now I was supposed to take the lead! Panic!!!!
First: make sure I understood what my manager wanted me to include in this exercise (a lunch for the participants, etc)
Second: talk to those who had planned the ones in the previous years!
Third: get organized: make lists, spreadsheets, etc. prioritize my work, based on timelines.
Fourth: get some help. Select people to assist, based on my knowledge of their skills, and recommendations of others (having the right people on a team is essential to success!)
Fifth: delegate, monitor, follow-up
check in occasionally with my manager, etc. etc.
Another example: I worked at the airport. At about 4:30 am, construction workers cut the power to half the terminal, knocking out the security alarm system. We needed to get the terminal opened up so the morning flights could take off, but could not allow people access to the fire escapes, due to the alarms not working. We (the police) did not have enough people to guard all the fire escapes. So, I asked the maintenance foreman if I could use his custodians to guard the doors. He said okay. All flights got out on time, with no breach of security. (I like this example because it shows that I get along with others - he did not have to lend me his crew!)
So basically, when answering these questions, take the STAR approach:
What was the SITUATION
What TASK did you need to accomplish
What ACTION did you take
What was the RESULT
I hope this helps!