Yes it can
No key signature has two of the same flat or sharp.
There is no key signature that has Bb and C#.
D major has a key signature of F sharp and C sharp D minor has a key signature of B flat
The key signature indicates which notes are sharp, natural, or flat. Every key has a specific signature.
Only "B flat" is the key signature, then "C sharp" is the accidental.
No key signature has two of the same flat or sharp.
There is no key signature that has Bb and C#.
D major has a key signature of F sharp and C sharp D minor has a key signature of B flat
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.
The key signature indicates which notes are sharp, natural, or flat. Every key has a specific signature.
None. No key signature contains a mix of flats and sharps.
Only "B flat" is the key signature, then "C sharp" is the accidental.
The sharps indicate which notes are sharp. You have to learn how to recognize sharp keys, same as with flat keys.
A key signature is basically a collection (or bunch) or sharp or flat symbols at the start of a line of music which tells you which notes are going to be regularly played sharp or flat.
The key signature tells you what the quality of each note in the piece will be (sharp, flat, or natural).
D minor - more specifically, D harmonic minor (the version of the minor scale with a flat 6 and a sharp 7). However, you will never see a key signature with a B flat and a C sharp. The key signature will only contain B flat.
A key signature