問題文
A retailer's team asks how the same person appears across products at the data level: a customer in commerce, a contact in service, and a subscriber in marketing. What is the most accurate description for the architect to give?
選択肢
- The person is represented by separate records in each product, each with its own key, so relating them to one person requires a shared stable identifier or identity resolution rather than assuming the keys already match.
- The person is stored as one shared record that all three products read and write directly, so the commerce customer, the service contact, and the marketing subscriber are literally the same physical record too.
- The keys always match automatically because every product uses the email address as the primary key, so a shopper who changes address breaks the match and turns up as a stranger.
- Only the marketing subscriber record exists; the others are illusions, so the commerce customer and the service contact are reporting artifacts and the subscriber key is the identity.