C_THR81 Employee Central Core Practice Question
An Employee Central administrator is setting up a new association on a custom MDF object 'EmployeeProjectAssignment'. The association must link each project assignment record to exactly one employee record in the Employee Central 'Employee' object. The administrator needs to ensure the association is configured so that an employee can be linked to many project assignment records, but each project assignment record references only one employee. Which association type should be configured on the 'EmployeeProjectAssignment' object to the 'Employee' object?
⚠ Common exam trap
Many candidates confuse the direction of the association and assuming that many-to-one on the custom object means many employees to one assignment, when it actually means many assignments to one employee.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Many-to-One association with the Employee object as the target
The requirement is that many project assignment records can point to one employee, while each assignment record points to exactly one employee. In MDF, this is modeled as a many-to-one association on the custom object with Employee as the target. This allows multiple records on the custom object to reference the same employee record without allowing a single assignment to reference multiple employees.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Many-to-Many association with the Employee object as the target
Why it's wrong here
A many-to-many association would allow multiple employees to be linked to a single project assignment record, which is not allowed because each assignment must belong to one employee. This association type is used when both sides can have multiple records, such as employees and skills, but it does not enforce the single-employee constraint required here.
- ✗
One-to-One association with the Employee object as the target
Why it's wrong here
A one-to-one association would restrict each employee to only one project assignment record, which contradicts the requirement that an employee can be assigned to multiple projects simultaneously. This association type is appropriate for unique relationships like an employee and their passport, but it would prevent the necessary multiple assignments.
- ✓
Many-to-One association with the Employee object as the target
Why this is correct
A many-to-one association from the custom object to the Employee object allows many project assignment records to reference the same employee, while each assignment record holds a single employee reference. This matches the requirement exactly: an employee can have multiple assignments, but each assignment points to only one employee. The association is configured on the custom object with Employee as the target.
- ✗
One-to-Many association with the Employee object as the source
Why it's wrong here
A one-to-many association would allow one project assignment record to be linked to many employee records, which is the opposite of the requirement. This configuration would permit an assignment to reference multiple employees, violating the business rule that each assignment belongs to exactly one employee. It does not enforce the required cardinality from the assignment side.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official SAP exam blueprint
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