How many sharps or flats are in D major?

2: F♯ and C♯. They are written in that order at the start of every line of music.

What are the chords in D major?

D (I), Em (ii), F♯m (iii), G (IV), A (V), Bm (vi) and C♯dim (vii°).

B minor. It uses exactly the same notes and the same key signature, but treats B as home.

A, the V chord. It creates the strongest pull back to D.

Key

The key of D major has 2 sharps: F♯ and C♯. Its scale is D, E, F♯, G, A, B and C♯.

Key signature

Start on D and tap each note of the D major scale going up.

0 of 7 notes

Stack every other note of the scale on each step and you get these chords. I, IV and V carry most songs: I is home, IV moves away, V pulls back home.