How often do people who work as professional programmers rely on the Google search to find answers to their programming problems

Answer 1

It's rather common, there is even atleast one site dedicated to that kind of exchange (stack overflow).

There is a great overlap in many of the problems people have to solve (hence newer languages providing more extensive libraries), so why reinvent the wheel on the common stuff? You'll hit something you need to innovate soon enough.

Answer 2

Most of the time. The chances that someone else had the same problem or doubt as you did are high enough :)

Answer 3

Really often. As one of my professors once said: If you need to code it, it's probably been done before. And in a better way.

Answer 4

most of the time . everyone​ can forget something.