Answer:
I have all the knowledge you have. But I am so small that I can fit into your hands. What am I?
I live off of a busy street if you want you can stay for an hour or two but if you don't pay rent I'll tell on you.
I am full of holes but still holds water.
you need thousands of me to create a digital image.
I am the ultimate killing machine used not once but TWICE I can be made by humans.
Give it food and it will live, give it water and it will die.