What is the recommended approach to share data from a parent interface to a child interface rather than accessing the parent's scope directly?

What is the recommended approach to share data from a parent interface to a child interface rather than accessing the parent's scope directly?

• A. Directly reference the parent's local variable in the child
• B. Always fetch data from a server
• C. Pass data via a rule input from the parent
• D. Use a global constant

Answer: (C)

Sharing data from a parent interface to a child should follow explicit data flow using rule inputs. The child interface is designed to declare rule inputs, and the parent supplies the values when it composes or calls the child. This keeps the child decoupled from the parent’s internal variables, making the interfaces reusable in different contexts and easier to test. Directly referencing the parent’s local variable isn’t reliable because the child doesn’t have access to the parent’s scope, which leads to tight coupling and fragile maintenance. Fetching data from a server is unnecessary for simply sharing data already available in the parent, and using a global constant doesn’t allow dynamic, context-specific data to be passed down. Pass the data via a rule input from the parent to the child.

Sharing data from a parent interface to a child should follow explicit data flow using rule inputs. The child interface is designed to declare rule inputs, and the parent supplies the values when it composes or calls the child. This keeps the child decoupled from the parent’s internal variables, making the interfaces reusable in different contexts and easier to test. Directly referencing the parent’s local variable isn’t reliable because the child doesn’t have access to the parent’s scope, which leads to tight coupling and fragile maintenance. Fetching data from a server is unnecessary for simply sharing data already available in the parent, and using a global constant doesn’t allow dynamic, context-specific data to be passed down. Pass the data via a rule input from the parent to the child.