G (or E minor)
The key signature that includes the note E sharp is the key of F sharp major.
The key signature for D sharp minor would be the one for F sharp major: FCGDAE. You can also think of it as E flat minorwhich is related to g flat major in which the key signature would be BEADGC.
D major has a key signature of F sharp and C sharp D minor has a key signature of B flat
A major, or F# minor
B Major is the 1st major scale that CONTAINS A sharp and F sharp within its key signature but has a total of 5 sharps which are, F# C# G# D# A# F# Major also CONTAINS A sharp and F sharp within its key signature but has a total of 6 sharps which are, F# C# G# D# A# E# C# Major also CONTAINS A sharp and F sharp within its key signature but has a total of 7 sharps which are, F# C# G# D# A# E# B#
The key signature of D sharp major has nine sharps: F, C, G, D, A, E, B, and F.
A key signature with one sharp (F#) would be either G major or E minor.
The key signature with 7 sharps is C-sharp major. In this key, the sharps are F-sharp, C-sharp, G-sharp, D-sharp, A-sharp, E-sharp, and B-sharp. Its relative minor is A-sharp minor, which also features the same key signature.
There are six sharps in F sharp major.
Key of F#, key of B, key of E, key of A, key of D, and key of G
To determine the key signature with sharps in a musical piece, look at the last sharp in the key signature. This sharp will be a half step up from the note that represents the key. For example, if the last sharp is F, the key signature is G major.
F-double-sharp major is a key which exists only in theory and not in practice, it's key signature would have six double-sharps and one B sharp. It's enharmonic is G, which has one sharp, so that'll be preferred.