As illustrated in the image above, the order of the sharps is always:
F♯, C♯, G♯, D♯, A♯, E♯, B♯
This order is the exact reverse of the order of flats. Every song that you will play will have a configuration of either sharps or flats in the key signature (except for songs written in C Major or A Minor). The order of sharps should be memorized to save yourself time when learning new music and for when you have to sight read.
If you see 2 sharps in the key signature, you should automatically know that they are F♯ and C♯ without having to read the lines and spaces to figure it out. There are no exceptions to the rule when it comes to the order in which sharps appear in the signature.
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