Yes. While officers are the pampered few, and may leave military service pretty much any time they choose by "resigning" their commission, washing out of OCS does not raise you to the ranks of officer. Therefore, being a grunt like the vast majority of those who serve, you have a contract. That contract is binding. You will be required to fulfill the terms of that contract. You will serve your time.
It wouldn't happen straight off. If they enlisted with a degree, were assigned to a unit, then sent to OCS, they'd certainly not return to that unit. If they did a four year contract while enlisted, then went to university for four years, and obtained a commission, then it could be possible.
A high school diploma for the enlisted. A bachelor degree for officers.
It's all dependent on a number of things. If you hold an MOS which has a high turnover, you have better chances of faster promotion. Additionally, your abilities as a soldier will have a bearing on this.
You have to go to flight school
After dental school training 2 to 3 more years of specialty training are required.
You need a high school diploma or general education degree (also known as a GED) in order to complete EMT training. If you do not have the required educational training, you cannot complete EMT training.
You will need a High School diploma to be an enlisted member and a college degree to be a commissioned officer. Both require some sort of basic training provided by the military.
Only for Commissioned Officer programs. For Enlisted ranks, a minimum High School diploma / GED is required.
Full medical degree plus additional training is required to obtain a license as an anethesiologist.
Can't do it. The Army required a GED minimum when I enlisted, and has since upped the requirement to an actual high school diploma.
Yes. All enlisted Marines must complete boot-camp and either school of infantry or Marine combat training, regardless of previous service in another branch.
'Enlisted navy officer' is not a designation. If you are enlisted, you are not an officer. An officer can apply for Medical school, whether they can remain on active duty or not will depend on the program they can get accepted to.