MidTerm Exam

1
Mid-Term Exam
2
Sources of Info

• Text (chapters 1 - 16)
• Powerpoint Slides (all sets)
• Workspace examples
• Smalltalk Mutual Support List
• Your Projects

3
Basic Object Concepts

• what is an object
• objects contain both behavior and data
• benefits of the use of the object model

4
Object Oriented Programming Definitions

• object
• encapsulation
• inheritance
• polymorphism
• clients and servers
• etc.

5
Planning Your Logic

• Pseudocode
• Flowcharts
• flowcharts of selection
• flowcharts of iteration
• test-before loops
• test-after loops

6
ST Language Fundamentals

• Literals, variables, classes
• Naming conventions in ST
• Structure of a ST expression (receiving object,
  selector, argument(s))
• Assignment statements

7
Classes and Instances

• Class Hierarchy
• Use of the Class Browser
• Common classes
• Object
• Magnitude
• Float
• String
• Collection
• Date
• etc.
• Common methods for common classes

8
Structure of Smalltalk Expressions

• receiver
• selector
• argument(s)

9
Smalltalk Statements

• assignment statements
• punctuation
• cascading

10
Smalltalk Conventions

• class names
• variable names
• method names

11
Messages

• unary
• binary
• keyword
• precedence

12
Control Structures

• sequence
• selection
• iteration
• implementation of these in ST

13
Conditional Statements

• Booleans
• Boolean, True, False
• statements that evaluate to a Boolean

14
Blocks

• defining them
• using them in conditional statements
• using them in iteration statements
• zero argument blocks and one argument blocks

15
Writing ST Conditional Statements

• logic
• the way ifTrue , ifFalse , and
  ifTrueifFalse work
• types of statements

16
Formatting Conditional Statements

• (a b)
• ifTrue ..
• ((c lt d) (f gt g))
• ifTrue
• ..
• ifFalse
• ..
• .

17
Iteration

• logic
• test before and test after loops
• how whileTrue and whileFalse operate
• use of blocks

18
Types of Selectors for Looping

• timesRepeat
• "For" loops
• Ex 1 to 10 do thisNum .
• "While" loops
• Ex block1 whileTrue block2.
• "Repeat Until" loops
• Ex block1 whileTrue block2.

19
Collections

• types (bags, sets, arrays, strings, ordered
  collections, sorted collections, dictionaries)
• remember the chart
• know
• indexed?
• fixed number of elements?
• duplicates allowed?
• accessed by key?
• restrictions on types of values?