Joe has posted the monthly roster on the staff notice board - HSC - SSCE Business Studies - Question 4 - 2006 - Paper 1

In this scenario, Joe demonstrates two key management roles: interpersonal and decisional.

1. Interpersonal Role: Joe's action of posting the monthly roster and scheduling each staff member's preferred day off reflects his engagement with team members. As a manager, Joe communicates directly with his staff, fostering relationships and understanding their needs. This role is vital for building rapport and ensuring team morale.

2. Decisional Role: By deciding the preferred days off for staff, Joe makes critical decisions that impact team scheduling and overall operational efficiency. This aspect of the managerial role involves making informed choices that benefit both the organization and its employees.

Therefore, the correct option is (D) Interpersonal and decisional.