Again a very important interview question as interviewer wants to know if you faced this situation earlier, if yes how you overcome it.

This is a very important concern in any team and it needs to be solved very diligently.

        Because cherry picking can be done by senior people also.

1. As an Agile Practitioner/Scrum Master/Product owner make SURE in sprint planning meeting you have clear, refined and prioritized backlog ready for the team to work.
2. As Scrum given the freedom to any individual to pick up any task…but hold on only on the prioritized stories which are selected by your product owner.
3. Not doing that will lead to a lot of unfinished tasks at the end and your product may not be in a condition to give a demo to the stakeholders.
4. If the team fails in understanding the goal of the sprint, the scrum master should help him on this. Additional training might also help.
5. Let the cherry-picking task be transparent to EVERYONE in the daily scrum (As we use scrum board) and when everyone will see that work in PROGRESS are many and not moving towards completed state then you can directly ask the team what the reason could be and what are the possible ways to overcome them. Best way to show your Scrum Master skills.
6. Some people may do cherry picking if they find SOMETHING interesting task to be picked up or easy task, but SCRUM is all about team goals, not an individual. An individual may automatically succeed if the team succeeds.
   

For an interview this will be a trap so don’t tell that I will have to tell him to do this and that…No micromanagement. Don’t TRY to take the driver seat…