Question

two famous personalities in the field of computers who were successful

but experienced massive failure at one point in their lives​

Answer 1

Ans:

First one is known to all of us that's Charles Babbage who was also called the father of Computer experienced many failures during his first project i.e, The Analytical Engine.

Another one is John McCarthy aslo known as the father of Artificial intelligence (AI). experienced many failures during his contribution on CS and AI.

Hope it helped you!