The Structure of the Exam

• For all topics, you should be able to trace, analyze, and write Java code.
  • Questions will for the most part consist of:
    • presenting you with a piece of code and asking you what is output — or what the value of one or more variables are — once the code is executed
    • presenting you with a problem description and asking you to write the corresponding code
    • asking you what is wrong with a piece of code and/or asking you to repair it
    • presenting you with a piece of code and asking you to trace the value of one or more variables as the code is executed
• Although you will not be asked for definitions of terms (e.g. literal, method header, loop body), you should know them as they will be used in the text of the questions.
• A substantial portion of the exam will be taken from the Exercises, Reading, Coding, and Testing Labs of the covered lectures (Lectures 6-14)
• While the book is a good supplement, you are only responsible for topics and material in the lecture notes and the CodeLab exercises / labs. The labs are a great way for you to prepare yourself for the exam.

The exam is cumulative but concentrates on lectures 6-12 (excluding lecture 8).

Here is a detailed breakdown of the new topics from those lectures

Expressions

• Operators
  • Logical
    • !, &&,
    • ||
    • Short-circuiting of && and ||
  • Increment / Decrement
    • ++, --
  • (String) Concatenation
    • +
    • Using concatenation to convert other types to string (e.g., for printing)
• precedence of logical operators

Methods

• Boolean-valued methods

Basic Techniques

• Toggling booleans
• Evenness / Oddness
• Swapping / exchanging
• Shifting / rotating

Loops

• while, for loops, and do/while loops
• priming the pump

File and keyboard I/O

• read in data using header values, trailer values, eof

Random Numbers

• The Random class
  • creating a Random object with and without a seed.
• The nextInt and nextInt(int) methods

Tables and Nested Loops

• Using a nested loop to generate a table's values

Formatted Output

• Using the printf method to print a table's value in tabular format
  • You only have to know how to specify integer (%d) and floating point (%f) formats with a width (e.g. %3d)

Loop Techniques (Techniques II)

• Totalling, counting, searching, and finding the maximum/minimum of a sequence of values (from an ipout file)
• Using a break statement or a boolean flag to exit a loop

Arrays

• Declaring, creating, initializing, accessing, modifying, traversing
• elements, index/subscript
• ArrayOutOfBoundException
• Arrays and for lops; the enhanced for loop

Array Operations and Techniques (Techniques III)

• first, last, middle and mirror element
• traversing forward and backward
• traversing with a condition
• printing
• initializing using a file with a header value
• minimum/maximum, sum, average
• searching: find and contains

Numeral Systems

• binary, medical, hexadecimal number systems
• converting between any of the above
• simply binary addition