Review: keep model, behavior, and exposure distinct

A maintainable RAP solution gives each artifact a clear responsibility. The root model describes data, behavior defines transactional operations, projections tailor consumers, and the service artifacts expose a protocol. Authorization, validation, draft, and concurrency controls are part of the design—not automatic consequences of publishing an API.

This original quiz is interactive in the browser, but it does not compile a RAP BO or connect to an SAP system.

Sources

• SAP Samples: RAP Behavior Definition Language
• SAP Samples: ABAP EML for RAP

Developer practice · ABAP

Practice: RAP architecture knowledge check

Answer these original review questions about assembling a RAP business object and service.

1. What is the role of a CDS root entity?

It models the top-level business-object data shapeIt publishes an OData endpoint by itselfIt replaces the behavior definition

2. What does a composition usually express?

A dependent parent-child lifecycle relationshipA database indexA service protocol

3. What does managed RAP provide for standard operations?

Runtime-managed transactional handling for enabled standard CRUDA guarantee that every custom rule is implementedAn automatically published public endpoint

4. Why add a projection?

To tailor an API contract and operation set for a consumerTo bypass base behaviorTo persist draft data automatically

5. What does a validation do?

Checks data and can reject a savePublishes the service bindingChanges the database table's key

6. Does CDS DCL alone authorize a RAP update?

No; read access control and RAP change authorization are distinctYes, for every operationYes, if the UI hides the button

7. What is a draft workflow for?

Saving incomplete work so a user can resume and later activate itMaking every EML call read-onlyReplacing the active persistence table

8. What does a service binding do?

Binds a service definition to a protocol and publishes itDefines the root table's fieldsImplements a validation

Check answers

Choose one answer for each question.