I looked a this time to reflect and to regroup and research opportunities further my career aspirations.
There could be very personal reasons for a break like that. It may have nothing to do with career or traveling, it may just be something personal. In other words: it may be nobody's business. Good questions to ask in reply are: "Why do y ou want to know? How will it help you to know that? Did you stop to consider that there might be a reason I didn't include it in my CV?"
Some people are numerical (always like to see numbers), some are color focused (green, yellow, red-more focus on red), some are results oriented (don't want to know anything else), some are subjective (how it was done is more important than if it was completed successfully) - For project mgmt a proper dashboard is the mostly what satisfies everyone in the mgmt team.
There should be a clear process for documenting the scope and requirements of the project; the Sponsor should sign off on it. The Developer needs to commit to fulfilling the requirements, so they need to have access to the document.
Be prepared to answer in details and only on the asked subject. Keep tuned very serious till the end. My second interview was look like a 40 minutes of cross interrogation without a second for thinking in between.