REF: AI Tools/ChatGPT 🧠 Understanding DNS Lookup and dig Command Output — A Complete Guide with Examples If you’ve ever used the internet, you’ve used DNS — even if you didn’t know it. The Domain Name System (DNS) converts human-friendly names like www.example.com into IP addresses like 93.184.216.34.Let’s explore how a DNS lookup works using …
Category: Root
Sep 09
Create an administrative user in Ubuntu 24
Go to Terminal sudo adduser newAdminuser sudo usermod -aG sudo newAdminuser sudo usermod -aG sudo newAdminuser su – newAdminuser
Aug 28
Factory Pattern vs 🏭 Abstract Factory Pattern in Java
Abstract Factory Pattern Example in Java From: AI Tools/OpenAI/Chatgpt “ Perfect 👍 Let me give you a clean, copyright-free Abstract Factory Pattern Java example with explanation. 🏭 Abstract Factory Pattern Example in Java Problem: We want to create UI components (Button, Checkbox) for different operating systems (Windows and Mac). The client should be able to …
Aug 28
Builder Pattern vs ⚙️ Factory Pattern in Java
From AI Tools/Open AI/ChatGPT “ Perfect 👍 Here’s a copyright-free comparison table of the Builder Pattern vs Factory Pattern in Java, styled for easy posting on Facebook/Blog: 🏗️ Builder Pattern vs ⚙️ Factory Pattern in Java Aspect Builder Pattern Factory Pattern Type Creational design pattern Creational design pattern Purpose To construct complex objects step by …
Aug 28
Factory Design Pattern: Examples in Java
Observe the code below: We wanted to create objects such as shape1, shape2, and shape 3. We did not directly (create and) call the class for the required objects. We did not create or call a circle class, or a square class, or a rectangle class. We rather thought there was a factory class that …
Aug 28
Builder Design Pattern: Example in Java
Observe these two examples of Object Creation from the Student Class We did not call the constructor with the property values, but we built the object step by step with only the properties and values we needed. This can be useful when we have classes with many properties, many properties/attributes are also optional or serve …
Aug 27
Differences among Functional Diagrams, Activity Diagrams, Sequence Diagrams, and Class Diagrams? Why are these important in OOD and OOP.
Got it 👍 I’ll structure everything into a clear comparison table that’s easy to read and copyright-free for posting on your FB/blog. 📘 OOD & OOP Diagrams – Quick Comparison Diagram Type Purpose / Focus Static or Dynamic Example Use Functional Diagram Shows system functions and how data flows between them. Static (overview level) Mapping …
Aug 20
On RRSP Over Contribution in Canada
On RRSP Over Contribution in Canada. “Here’s a clean, copyright-free version you can safely post on Facebook or your blog. I’ve rewritten it in plain, friendly language so it’s clear and useful without sounding like legal or financial advice. ❓ How much can I contribute to my RRSP in Canada, and what happens if I …
Aug 12
CPI, Core CPI, and Inflation
Ref: AI/Chat/Internet Sure — here’s a concise, copyright-free summary: CPI (Consumer Price Index) measures how the average prices of a set basket of goods and services change over time. It’s the main public measure of inflation: rising CPI means prices are going up; falling CPI means they’re going down. Core CPI is the same calculation …
