Sure. The Conjuring draws from the Warrens' work. They documented a lot of strange and unexplained phenomena during their investigations. The filmmakers took these real accounts and turned them into a horror movie. They added some fictional elements for the sake of entertainment, but the core of the stories is based on the Warrens' true cases.
Yes, it is. The Conjuring is based on the real - life cases of paranormal investigators Ed and Lorraine Warren. They had many experiences dealing with haunted houses and demonic possessions, and the movie takes inspiration from some of those events.
Well, it's inspired by real-life cases but the movie adds a lot of fictional elements for entertainment purposes. The basic premise might have roots in reality, but it's not a 100% accurate account.