Interviews value adding
When you get these questions about doing extra work at the interview, it's your cue to start showing the interviewers what you can do.
You need to know what they really need in terms of adding value to the job.
Think about the job, and the extra work which attaches itself to any job.
In your own field, this is stuff you already know. If you're a plumber, you'd know you need to show a range of skills which naturally apply to plumbing, like welding, and any training in building you may have. All relevant, all good for the interviewers, because it's a range of skills they won't need to teach you if you get the job.
So when the extra work questions come along, you can give them a lot of examples. These are your more advanced skills, the ones they'd like to have with the job.
You can also do this with other questions.
Problem solving, for example, comes in various levels. You can show extra value by giving an example where you had the skills to do something to solve a problem above your job requirements. That is often the case in problem solving, where you actually have to do much more than the job requires.
Any interview question may give you the opportunity to add value.
Remember, all this relates to the real workplace. Your added value has to have some obvious practical uses. It's best if you can show skills which indicate you've got a whole skill set above the requirements of the job. You may look a bit overqualified, but you also look like good value.