Question 6 - Certified B2B Commerce Administrator discussion

One product feature that could allow NTO to reference historical data in another system from the Salesforce user experience as read-only, without importing the data into the org or incurring storage costs, is External Objects. External Objects are similar to custom objects, except that they map to data that's stored outside your Salesforce org. External Objects let you access data from external sources in real time via web service callouts. You can use External Objects to integrate Salesforce with other systems and create relationships with other Salesforce objects. You can also use standard Salesforce features such as global search, lookup relationships, reports, and dashboards with External Objects. The other options are not correct because:

Big Objects are a type of custom object that can store and manage massive amounts of data on the Salesforce platform. Big Objects do not reference external data sources, but rather store data within the org. Big Objects also incur storage costs based on the number of records and fields.

Lightning Out is a feature that lets you run Lightning components outside of a Lightning Experience container. Lightning Out does not reference external data sources, but rather embeds Lightning components into other web pages or apps.

External SOQL queries in Apex code are a way to query external data sources using SOQL syntax. External SOQL queries do not reference historical data from another system, but rather current data from a connected app. External SOQL queries also require importing data into the org via Apex code.