Music theory is basic music theory knowledge, such as chord inversions and so on
Dictation is actually included in music theory, and it takes some tests to listen to single notes or chords or rhythms and melodies, etc.
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You missed one thing, sight-singing, which is to temporarily draw a piece of music, have a short preparation time, and then sing it to test the ability to read music and the singing intonation
The specific test methods vary from school to school Different, the scope of the exam will be slightly different, but it will not break away from sight-singing, ear training and music theory
If you want to take the exam, it is recommended to find a teacher to learn it, because you seem to have not started yet, and there is a professional teacher to give guidance. It will be clearer and save time~
Good luck~