I don't know who Dave is in this story. He could be an ordinary person with an extraordinary story, or maybe he's someone known in a specific community.
Most of Dave Pelzer's story is true. It's a recount of the hardships he faced during his childhood. However, there might be some minor elements that have been slightly embellished for literary purposes, but the core events are factual.
It depends. Sometimes stories are based on real events but have fictional elements added. Without specific details about 'Dave', it's hard to say for sure.
I'm not sure specifically who Dave is without more information. He could be an ordinary person with an extraordinary story, or someone well - known in a particular community or field.