SOFTWARE DESIGN TECHNIQUES

requirements of the system. System Specification is used in deriving what the system should do, without saying how this is to be achieved. Design phase is intended towards addressing how the system is to be implemented. Implementation phase is traditionally described as programming. Unit and System testing aims to trap bugs.

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GRASP Design Principles

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Pure Fabrication Fabricated class/ artificial class – assign set of related responsibilities that doesn't represent any domain object. Provides a highly cohesive set of activities. Behavioral decomposed – implements some algorithm. Examples: Adapter, Strategy Benefits: High cohesion, low coupling and can reuse this class.

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INTEGER LINEAR PROGRAMMING - INTRODUCTION

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GLPK integer solver • GLPK has a very good integer solver. • Uses branch-and-bound + Gomory cut techniques • We will examine these techniques soon. • In this lecture, • Show how to solve (mixed) integer linear programs • Continue to use AMPL format. • This is the best option for solving ILPs/MIPs

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TESTING FRAMEWORKS

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Where does Test Automation fit in the Software Life Cycle • Considering the earlier software life cycles such as the waterfall model the test automation appears in this life cycle during the implementation and testing phase.

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Object Oriented Databases

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Object oriented databases or object databases incorporate the object data model to define data structures on which database operations such as CRUD can be performed. They store objects rather than data such as integers and strings. The relationship between various data is implicit to the object and manifests as object attributes and methods

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Object Oriented Design

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OO Design 2 Object-Oriented Design Traditional procedural systems separate data and procedures, and model these separately Object orientation combines data and methods together into a cohesive whole data abstraction The purpose of Object-Oriented (OO) design is to define the classes (and their relationships) that are

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Numerical Solution of Diﬀerential Equations

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This set of ﬁrst-order ODEs is equivalent to x′′′ 1 = 14+x21 −36logx′ 1 −sin2t, as you can see by substituting the ﬁrst two equations into the third. The variables that appear on the left-hand side of an ODE system are termed the state variables of the system. The state vector ~x of this system is (x1 x2 x3)T and the ODE system ...

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