問題文
A media company wants a single dashboard that pulls a subscriber's viewing history from one system, billing status from another, and support tickets from a third, combining them on demand each time the dashboard opens. Which use case is this?
選択肢
- Aggregation, which gathers data from several sources and combines it into one result when it is requested.
- A correlation, which only synchronizes the records that already exist in all three systems and creates nothing new.
- A one-time migration; assembling a dashboard from three systems is by definition a single cutover move that runs once and stops.
- A broadcast, which would instead push one system's changes outward to the other two systems continuously rather than pulling their data together on demand.