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00: Why favor composition over inheritance?

This not only one of the most popular Java OOP Interview Questions & Answers asked 90% of the time in job interview, but also a key OOP concept you must know …


01: Q13 “12 Rules” for REST API design & development

These are more like rules to develop RESTFul web services as opposed to being the best practices. REST is an architectural style without any contracts or specifications. So, it is imperative …


05: Q19- Q24 How to create a well designed Java application with OOP?

A software application is built by coupling various classes, modules, and components. Without coupling, you can’t build a software system. But, the software applications are always subject to changes and enhancements. …


06: Q25 – Q32 Design principles interview questions & answers for Java developers

Design principles interview questions & answers for Java developers so that you can expand your OOP skills to design robust Java apps Q25. What are the SOLID design principles? A25. SOLID …


6 tips to go about writing loosely coupled Java applications

6 tips to go about writing loosely coupled Java applications useful not only for talking the talk in Java job interviews, but also to build maintainable Java applications. Q1. What is …


Understanding Open/Closed Principle (OCP) from the SOLID OO principles with a Java example

Q. Is there anything wrong with the following class design? If yes, can the design be improved?

…

Why does good API design matter?

Q1. Why is a good API design important? A1. The Application Programming Interfaces (i.e. APIs) are fine grained services/libraries used by other applications, systems and libraries. A good API design improves …


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