Q1. How would you go about designing a “farm animals” application where animals like cow, pig, horse, etc move from a barn to pasture, a stable to paddock, etc? The solution should also cater for extension into other types of animals like circus animals, wild animals, etc in the future....
Extends Can you design classes & interfaces using OO?. Only experience, and asking the right questions can teach you what design pattern to use, in which scenario.
Scenario: A company named XYZ Retail is in the business of selling Books, CDs and Cosmetics.
…
The following post improves on the design flaws listed in the previous post entitled 02: Scenarios based Java OO design & GoF design patterns – naive Template Method pattern. Scenario: A company named XYZ Retail is in the business of selling Books, … Read more ›...
Q1. What is a class invariant? A1. Class invariant is — what must be true about each instance of a class? If an invariant fails then there could be a bug in either calling-method or called-method. It is convenient to put all the expressions required for checking invariants into reusable...
This extends 12 UML Interview Questions & Answers. Q1. How would you go about designing a system as described below? A barn that contains animals such as cows and horses. A farmer milks the cows in the farm, and the animals eat hay that are stored in the barn. …...
4 Part practical design concept series Part 1: Abstraction | Part 2: Single Responsibility Principle | Part 3: Open Close Principle | Part 4: Dependency Inversion Principle. … Read more ›...
4 Part practical design concept series Part 1: Abstraction | Part 2: Single Responsibility Principle | Part 3: Open Close Principle | Part 4: Dependency Inversion Principle. … Read more ›...
