Question

what will appear on the monitor if you press caps lock key followed by letter a twice

Answer 1

Caps Lock is a button on a computer keyboard that, when pressed, causes all letters to be generated in capitals until deactivated. It is located in the position of a similar Shift lock key (and sometimes a Ctrl key) found in some other keyboard layouts. It is usually a toggle key: each press reverses its action.

Exactly what Caps Lock does depends on the operating system and driver, and the keyboard layout implemented. On non-IBM PC-compatible computers it may also depend on the keyboard hardware. Usually the effect is the limited to letter keys; letters are capitalised, and non-letter characters are generated normally. In other cases the key may affect all keys, for example the "5" key generates a "%" when caps-lock is pressed.

Answer 2

it will turn on the capital letter system and when time you'll find capital letters