Great Gatsby 1979 movie version- similar to book?

I have a test on The Great Gatsby tomorrow, and to be honest... I only read 3 chapters of the actual book, and used Sparknotes for the rest of the book. So tonight the 1979 version of the film is going to be on, and from what I saw of it- it seems pretty similar to the book. So if I watch that, will I be good to go for the test? Thanks :)