✅ Abstract Factory similar to factory, but with a focus on the client add client to factory pattern interface creates the related classes instance 👍🏻 can hide which concrete pro...

✅ create a new instance by copying an existing instance the existing instance has a clone() method the existing instance == new copied instance ➡️ false the existing instance.eq...

Loose coupling OC principle default in interface 🛠️ When to use factory When you want to create several types of smth with different values give the creation role to a factory 👀 Yo...

🤷🏻‍♀️ What would happen if we did not have builder? Imagine we have a trip class attributes such as place, how many nights, how many days, hotel, start date… when we create a trip, w...

⭐️ Layered Architecture Hexagonal Architecture Unit test 🆚 Integration test IoC, DI, AOP ORM, paradigm, Hibernate JPA ✅ Layered Architecutre in Spring ❓ why use layered architec...

✅ TDD red blue green 🔴 first create the test code //test code @DisplayName("Calculate the total price of beverages in order") @Test void getTotalPrice() { //give...

✅ / root directory: origin of the tree root user are not the same! ✅ Level 0 / means root, origin of the tree kernel root directory all mean the same ✅ Level 1 all have ...

✅ Installation on RM ✅ Installation on VM ☑️ Suggestion 1 Internal harddisk in order to avoid slow reading/writing access to USB ☑️ Suggestion 2 The iso for the Ubuntu in the V...

✅ Installation every release have same hardware requirements 🆚 flavors require different hardware requirements If you do not have the hardware requirements, change the flavor⭕️, not the rel...

✅ Where to download should be done from canonical > ubuntu canonical: company that created ubuntu ✅ Two types of downloads 1️⃣ Desktop for your own computer 2️⃣ Server ...