For the GRE Literature exam, associate the following characters with Oliver Twist.
Oliver Twist
-orphan; protagonist (see below)
Noah Claypole
-apprentice; bully; drives Oliver from his employment
Fagin
-Infamous Jewish criminal; Dodger's handler
Bill Sikes
-the Dodger's brute
The Artful Dodger (Jack Dawkins)
-boy criminal mastermind
Mr. Brownlow
Otherwise, read the Wikipedia plot summary and know the following main points:
-Oliver is born in a workhouse; mother dies in childbirth.
-Oliver falls in with the Artful Dodger before finding more respectable employment.
-Oliver turns out to be Mr. Brownlow's niece's son, and comes into an inheritance.
-Oliver's sheming half-brother dies in an American prison.
Oliver Twist may be worth adding to your GRE Literature reading list. I recommend the Dover Thrift Edition
Don't be lured into watching the movie instead: the plot is quite different.