The leading note of Db major is C.
The D note
Technically speaking, D sharp major is: D#, E#, F* (F double Sharp,) G#, A#, B#, C* (C double sharp) D#. ***note: a double sharp (*) means that the note sounds a whole step above the principal note. For example: F*=G.
The subdominant is the 4th note in a scale, so in A major it's D.
B flat note, C note, D note, E flat note, F note, G note, A note, B flat note.
The pentatonic scale has 5 notes. It is similar to the omission of subdominant and leading note of major scale. Starting from D, the scale is D E F# A B.
D.
The tonic in D major is D.
The dominant note for D major and D minor is A.
The subdominant note is D in an A major scale
The leading note of Db major is C.
D major isn't actually a note. D major is a major scale based on the note D (D natural) and the scale has two sharps (F sharp and C sharp). There isn't anything special about D major since it requires both an F sharp and a C sharp, the most 'special' scale is C major since there are no flats or sharps needed.
The note "A"
The D note
B
The tonic note of any diatonic scale is the first note (starting note) of the scale. In the case of G-flat major the tonic note is G-flat!
Leading NOTE or the Root note is D#. Leading TONE is D which lies between the sub-mediant and the sub-tonic.
A sus 4