Final answer:
Upon graduation from OCS, personnel are appointed as officers at the paygrade of O1 and incur an obligated service which generally ranges from three to five years. This service commitment allows individuals to gain skills and experience in the military.
Step-by-step explanation:
Upon graduation from Officer Candidate School (OCS), personnel are commissioned as officers in the military at the paygrade of O1, which is the rank of Ensign in the Navy and Coast Guard, or Second Lieutenant in the other armed services. Along with this commission, officers incur an obligated service, which is the minimum period of time that they must serve in the military. The length of this obligation can vary depending on the branch of the military and the specific circumstances of their commissioning. However, it typically ranges from three to five years of active duty service. This commitment allows the individual to gain valuable skills and experiences while serving their country.