E major piano scale. From the Root note E, we create the E piano major chord. Then from the Root note using the piano formula for major scales- RWWHWWWH (R for root note, W for whole step and H fro half step), we create our E major scale.
From the above diagram, piano notes E, G# and B which when struck together creates the E major piano chord. Then applying the piano major scales formula, we get the following notes depicted in the below diagram: E,F#, G#, A, B, C#, D# and E again. This is what is termed as E piano major scale.