We know he'd taken the Kobiyashi Maru 3 times. He probably passed the first time and just kept insisting on a redo. Other than that, we never see him doing tests.
I also think you're mixing up rank and position. As multiple people have pointed out in various ways, you can be higher than a cadet and still be in school.
In reality, most naval officers where the same uniform regardless of position. My sisters camo's are the same as her instructors. When they're actually serving on a ship it changes a little, but on the ground it's what's on the camos that signify any difference. Star Trek actually made it easier to differentiate the staff, by giving them their own uniform.
As for an acadamic review in the navy, I'd say that in reality they'd usually show up in formal uniform (their whites) regardless of whether they'd graduated or not (I might be wrong there though). Considering we see the formal uniforms equivilant in STID, obviously it doesn't work that way in the Trek verse.
I also think you're mixing up rank and position. As multiple people have pointed out in various ways, you can be higher than a cadet and still be in school.
In reality, most naval officers where the same uniform regardless of position. My sisters camo's are the same as her instructors. When they're actually serving on a ship it changes a little, but on the ground it's what's on the camos that signify any difference. Star Trek actually made it easier to differentiate the staff, by giving them their own uniform.
As for an acadamic review in the navy, I'd say that in reality they'd usually show up in formal uniform (their whites) regardless of whether they'd graduated or not (I might be wrong there though). Considering we see the formal uniforms equivilant in STID, obviously it doesn't work that way in the Trek verse.