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Inheritance defines a “kind of” hierarchy among classes. By inheritance, we specify
generalization/specialization relationship among objects. In this relationship, a class
(called the subclass) shares the structure and behavior defined in another class (called the
inheritance denotes a “kind of” relationship, aggregation denotes a “part of” relationship,
and association denotes some semantic connection among otherwise unrelated classes.
Object Oriented Analysis
The intent of OOA is to define all classes, their relationships, and their behavior. A
number of tasks must occur:
1) Static Model
a) Identify classes (i.e. attributes and methods are defined)
b) Specify class hierarchy
c) Identify object-to-object relationships
d) Model the object behavior
2) Dynamic Model
a) Scenario Diagrams
1) The subsystem layer. Contains a representation of each of the subsystems that
enable the software to achieve its customers defined requirements and to implement
the technical infrastructure that supports customer requirements.
2) The class and object layer. Contains the class hierarchies that enable the system to
be created using generalization and increasingly more targeted specializations. The
layer also contains design representations for each object.
3) The message layer. Contains the details that enable each object to communicate with
its collaborators. This layer establishes the external and internal interfaces for the
4) The responsibility layer. Contains the data structures and algorithmic design for all
attributes and operations for each object.
These are four operations as describes below
Create: creates data and stores it.
Read: retrieves the stored data for viewing.
Update: makes changes in an stored data.
Delete: deletes an already stored data permanently.
usman javed kn c wrong statment hain aur kn c true ? mention tu karein n thnks 4 sharing your q:
ye all data just like short notes hy
Question No: 1 ( Marks: 2 )
Define abstraction ?
Question No: 2 ( Marks: 2 )
Is the design of software architecture a creative process?
Question No: 3 ( Marks: 2 )
Suppose you are working as a software engineer involved in the development of an ecommerce website.
What are the 2 most important characteristics your software must have?
Question No: 4 ( Marks: 3 )
What is the purpose of collaboration diagrams?
Question No: 5 ( Marks: 3 )
What is the difference between Aggregation and Association?
Question No: 6 ( Marks: 5 )
what parameters are used to measure and analyze design quality?
Question No: 7 ( Marks: 5 )
How the objects are identified in Peter codd’s tech
Mehak Munawer thanks for sharing
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What is the purpose of collaboration diagrams?
Collaboration diagrams can also be used to depict the dynamic behaviour of a system.
They show how objects interact with respect to organizational units (boundaries!)
Collaboration diagrams can also show
synchronous, asynchronous, create, and destroy message using the same notation as used
in sequence diagrams. Messages are numbered and can have loops
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