Covering all holes would be a C. Also covering the hole at the back and the second hole (a treble C)
I do not know if they have a musical name but they are commonly just called Recorder Holes.
8 holes
cleff
To play an E sharp on the recorder, you need to cover all the holes on the recorder with your fingers and blow air into the mouthpiece while pressing down the correct combination of holes. On a soprano recorder, the fingering for E sharp is the same as F natural. This means you cover all the holes on the recorder with your fingers, except for the first hole on the recorder's top. This will produce the E sharp note.
There Are 5 Fingers Are On F For A Recorder How To Finger F On A Recorder Is Just Like G First 3 Holes, Skip 1 Hole And Cover The Next 2 Holes That's How You Finger F On A Recorder
six
To hold a recorder properly, place your left hand on the top holes and your right hand on the bottom holes. Keep your fingers curved and cover the holes completely to produce clear notes. Hold the recorder at a slight downward angle and keep your posture straight while playing.
Cover the holes for the respective notes to get the sound.
Blow into it and cover the holes.
You use the left hand, the thumb on the hole in the back of the recorder, and the first two fingers on the first two holes in the front. That is, on a "A" type recorder.
If all the holes are open, that will produce the highest sound.
You asked this because it was on the Trivia....