To share data from a parent interface with a child interface, which option best describes how to pass the data?

To share data from a parent interface with a child interface, which option best describes how to pass the data?

• A. Directly reading the parent's local variables from the child
• B. Read the data from a shared database
• C. Hard-code the data in the child
• D. Pass the required data via a rule input from the parent

Answer: (D)

Passing data from a parent interface to a child interface is achieved through inputs, specifically by using a rule input defined on the child and binding a value from the parent when the child is embedded. This creates a clean, explicit data flow where the child declares what it needs and the parent supplies it, making the child reusable in different contexts and ensuring type-safe communication. Reading the parent's local variables directly isn't possible for the child and would couple the two interfaces tightly to the parent's internal state, which reduces portability and testability. Relying on a shared database for this purpose introduces unnecessary latency and synchronization concerns and isn’t the right pattern for passing simple, in-memory values. Hard-coding data inside the child eliminates flexibility and reusability. So, the best approach is to pass the required data via a rule input from the parent, keeping data flow explicit, modular, and reusable.

Passing data from a parent interface to a child interface is achieved through inputs, specifically by using a rule input defined on the child and binding a value from the parent when the child is embedded. This creates a clean, explicit data flow where the child declares what it needs and the parent supplies it, making the child reusable in different contexts and ensuring type-safe communication.

Reading the parent's local variables directly isn't possible for the child and would couple the two interfaces tightly to the parent's internal state, which reduces portability and testability. Relying on a shared database for this purpose introduces unnecessary latency and synchronization concerns and isn’t the right pattern for passing simple, in-memory values. Hard-coding data inside the child eliminates flexibility and reusability.

So, the best approach is to pass the required data via a rule input from the parent, keeping data flow explicit, modular, and reusable.