Answer:
There are several minor differences between the movie scene and the scene from book. The most noteworthy difference is Johnny's and Ponyboy's entrance into the party where they go to look for Dallas.
Step-by-step explanation:
In the book the author describes a scene where Johnny and Ponnyboy knock on the door of Buck Merril's place, and are eventually allowed to see Dallas. Where as in the movie, the older gentleman who answers the door shuts the door in Johnny and Ponyboy's faces, resulting in them needing to sneak into the place.