Here are the question sheets i used in the review sessions.

• environments (lexical and dynamic scope, Logo, environment diagrams)
• evaluators (enhancing the metacircular evaluator, behaviour of the lazy and non-deterministic evaluators, logic programs for the query evaluator)

Here are the model answers.

• environment stuff
• evaluator stuff

Hope this helps you out. If you have any questions about the material, feel free to write to me at cs61a-ti@cory.eecs.berkeley.edu. Good luck on the exam!