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⏯ Java Integration Styles Interview Q&As Video

Links to Java Architecture Q&As — Java/JEE integration styles interview questions and answers — Java/JEE Architecture overview interview questions and answers

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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?

JUnit test class.

A. It’s not a good idea to try to anticipate changes in requirements ahead of time, but you should focus on writing code that is well written enough…...

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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 flexibility, stability, and extendability of your application. Now a days, applications are built as reusable components or services. A…...

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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 is an abbreviation for 5 design principles. SRP (Single Responsibility Principle) If you have a class with calculation logic,…...

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Top 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 tight coupling? A1. If class OrderServiceImpl relies on parts of class PaymentServiceImpl that are not part of interface PaymentService,

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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. So, you need to build your applications such a way that they can not only adapt to growing requirements,…...

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02: ♦Q11 – Q15 Why favor composition over inheritance? Java OOP Interview Q&As

One of the most popular Java OOP Interview Questions & Answers asked 90% of the time in job interviews is why favor composition over inheritance? The correct answer depends on the problem you are trying to solve, and the answer you give lead to more follow up questions to test…...

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