Exam Three Information

\(\boxdot\) General Information

• First portion: closed resources - multiple choice, short answer, code tracing (50 points)

• Second portion: coding questions - allowable resources are RSI Textbook, course web notes, Python Tutor, methods cheat sheet (30 - 40 points)

• Two-hour interval

\(\boxdot\) Primary Topics

Selection

• unary

  if boolean_value:  
       .
       .

• binary

  if boolean_value:  
       .
       .
  else:  
       .  
       .

• chained

  if boolean_value1:  
       .
       .  
  elif boolean_value2:  
       .  
       .  
  elif boolean_value3:  
       .  
       .  
  else  (optional)  
       .  
       .  

Iteration

• for loops (definite)

  • for item in a_list:

  • for i in range(len(a_list)):

• while loops (indefinite)

  • while boolean_object:

  • sentinel values

Strings - ' ' or " "

• string traversal

• string functions, operators and methods:

  • len() function

  • + - concatenation operator

  • * - repetition operator

  • : - slice operator

  • in and not in operators

  • strip()

  • split()

  • replace()

Lists - [ ]

• list traversal

• list functions, operators and methods:

  • len( ) function

  • + - concatenation operator

  • * - repetition operator

  • : - slice operator

  • append()

  • insert()

  • pop()

  • reverse()

  • index()

  • count()

  • remove()

• list comprehensions

• conversion : string \(\leftrightarrow\) list:

Tuples - ( )

• tuple management (like strings):

  • len( ) function

  • concatenation operator +

  • slice operator :

• tuples as a function return

Dictionaries {}

• key and values

• “traversing a dictionary”

• adding a key-value pair

• changing the value in a key-value pair

• methods will be provided on the method cheat sheet along with those for stings and lists

Objects (Classes)

• general class structure

• class attributes and methods

\(\boxdot\) Types of Questions

• multiple choice and/or short answer:

  • basic mathematics binary operators and precedence

  • for and while loops

  • strings, lists and tuples

  • methods, functions and operators for strings, lists and tuples

  • accumulator pattern

  • boolean expressions using comparison operators

  • precedence : mathematical operators, relational operators, logical operators

  • selection (if, if - else, if - elif - else)

• error recognition:

  • basic syntax - when to use ( ), [ ]

  • indentation issues

  • improper use of strings, lists, and tuples (e.g. mutable versus immutable)

• code reading:

  • program flow of execution (main() and other functions)

  • accumulator pattern

  • variable values at certain locations in the code

  • function return values

  • Turtle graphics and L-systems - maybe

• code writing:

  • for and while loops

  • strings, lists, tuples, dictionaries, and Classes

  • random module functions - random() and randrange()

  • accumulator pattern

  • boolean expressions using comparison operators

  • precedence : mathematical operators, relational operators, logical operators

  • selection (if, if - else, if - elif - else)

  • proper indentation

• not included:

  • 3n + 1 sequence

  • Newton’s method

  • image processing

  • character classification (9.19)