Question

which key is used to display the upper symbol when pressed with
key having two characters.
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Answer 1

Answer

shift key

Explanation

The shift key ⇧ Shift is a modifier key on a keyboard, used to type capital letters and other alternate "upper" characters. There are typically two shift keys, on the left and right sides of the row below the home row. The shift key's name originated from the typewriter, where one had to press and hold the button to shift up the case stamp to change to capital letters; the shift key was first used in the Remington

Answer 2

Explanation:

Shift key is used. When shift is pressed the upper symbol appears on screen otherwise lower symbol appears.