using the "D" key to start diagnostics the same as the one started from Activity Monitor

Pressing and holding the "D" key at start up on an intel MacBook, the same type of Diagnostic that one can get,request while using the activity monitor.

No Replies is a good thing a senior citizen type like my self. Cause you can know it's a stupid question.Honestly can tell if is dumb. but now we can without being told we are stupid.