exam01 instructions

Instructions:

• This exam is 75min, in-class, on-paper.
• Please use any suggested abbreviations, to save writing. In addition, I recommend using short (but mnemonic) field-names (3 letters or so). E.g., def/c for define/contract, def-str/c for define-struct/c, mk-… for make-…, str<? for string<?, and nat? for natural?.
• Unless otherwise specified, you may write any exam-code in Java, or in Racket. You may switch languages between problems; just be sure to use the correct field/struct names.
  For each java method, specify which class that method belongs in.
• If using Java, you may assume a standard/boilerplate constructor, toString, equals, and hashCode have been written (as if using records, or perhaps automatically by your IDE).
• For any question, you may use functions defined in previous questions, even if you didn't complete the previous question.