Keyboard press other letters instead of showing the letter which I typed

Krishanmittal wrote:

When I tried to press a it presses q and when I tried to press q it shows me a how to solve this problem

Go to system settings > keyboard > text input > edit > input sources and use the minus button at the bottom to remove everything thing on the list except one item, and the name of that item should be US or ABC (or whatever your normal language is).

q instead of a indicates you have French instead of English or vice versa.