Despite everything you do, sometimes you end up with an image that is just a bit soft. I find this can happen when you are shooting with a long lens or in low light. Photoshop is a great tool to fix it and, there are several approaches to adding sharpness. My go-to tool for this situation is the smart sharpness tool. Increasing the sharpness will essentially add contrast around the edges of an object. A more subtle approach is to duplicate and overlay the duplicate as another layer and blend the two layers, depending on what you want to achieve.

The goal of your answer is to showcase an in-depth knowledge of Photoshop and how you use it as an extension of shooting images in the field. Your interviewer will expect you to understand how to use the tools you will use on the job.

Focus on the tools you would use in Photoshop to deal with a soft image. Tie it back to photography and explain the reasons you might need to sharpen an image.