Day 27/100

Tools & Tech Every Developer Should Know ⚒️👨🏻‍💻

❯ VS Code ➟ Lightweight, Powerful Code Editor
❯ Postman ➟ API Testing, Debugging
❯ Docker ➟ App Containerization
❯ Kubernetes ➟ Scaling & Orchestrating Containers
❯ Git ➟ Version Control, Team Collaboration
❯ GitHub/GitLab ➟ Hosting Code Repos, CI/CD
❯ Figma ➟ UI/UX Design, Prototyping
❯ Jira ➟ Agile Project Management
❯ Slack/Discord ➟ Team Communication
❯ Notion ➟ Docs, Notes, Knowledge Base
❯ Trello ➟ Task Management
❯ Zsh + Oh My Zsh ➟ Advanced Terminal Experience
❯ Linux Terminal ➟ DevOps, Shell Scripting
❯ Homebrew (macOS) ➟ Package Manager
❯ Anaconda ➟ Python & Data Science Environments
❯ Pandas ➟ Data Manipulation in Python
❯ NumPy ➟ Numerical Computation
❯ Jupyter Notebooks ➟ Interactive Python Coding
❯ Chrome DevTools ➟ Web Debugging
❯ Firebase ➟ Backend as a Service
❯ Heroku ➟ Easy App Deployment
❯ Netlify ➟ Deploy Frontend Sites
❯ Vercel ➟ Full-Stack Deployment for Next.js
❯ Nginx ➟ Web Server, Load Balancer
❯ MongoDB ➟ NoSQL Database
❯ PostgreSQL ➟ Advanced Relational Database
❯ Redis ➟ Caching & Fast Storage
❯ Elasticsearch ➟ Search & Analytics Engine
❯ Sentry ➟ Error Monitoring
❯ Jenkins ➟ Automate CI/CD Pipelines
❯ AWS/GCP/Azure ➟ Cloud Services & Deployment
❯ Swagger ➟ API Documentation
❯ SASS/SCSS ➟ CSS Preprocessors
❯ Tailwind CSS ➟ Utility-First CSS Framework

React ❤️ if you found this helpful

Coding Jobs: https://whatsapp.com/channel/0029VatL9a22kNFtPtLApJ2L

🔰 Java Roadmap for Beginners 2025

├── ☕ Introduction to Java
├── 🏗 Setup & IDEs
├── 🔢 Variables & Data Types
├── 📊 Operators & Expression
├── 🔁 Control Flow (if-else...)
├── 🔄 Loops (for, while....)
├── 🏗 Methods in Java
├── 📝 String Manipulation
├── 📦 Arrays & Collections
├── 🏛 OOPs
├── ⚠️ Exception Handling
├── 📂 File Handling in Java
├── 🔌 Multithreading
├── 🌐 Java for Web Dev

React ❤️ for more

Java projects with tutorial 🚀

Supermarket Management: https://youtube.com/playlist?list=PL-cxzMmn1xXEvQLajE2zYEfeF11lISJ0c&si=RwNa9HRFsrfFYvIy

Bank Management: https://youtube.com/playlist?list=PL_6klLfS1WqE1-_MJgZiJqAaccjLGHh0H&si=mw6PqEsAhrYskQjg

Cafe Management: https://youtube.com/playlist?list=PLdRq0mbeEBmwdwZF3lWwCcWmD76GfEFVT&si=opkQC14_5p3t0xBp

Chatbot: https://youtu.be/QP4HsdEPd-M?si=flwWw07VrWxr8qVY

Voting application: https://youtube.com/playlist?list=PLhHaibdHQVE1i3qWow-Mp0W_OrBrq1ykg&si=mtKqYDMxvgrMc97x

Food delivery: https://youtube.com/playlist?list=PL4fpXNDGXCyWXY7Sb_bp9VEENEW_UsG75&si=jHcdxrgbhbwvDqwa

University management: https://youtube.com/playlist?list=PL_6klLfS1WqH8iVglMyh7FVniAvD9Ar-E&si=i5jv8e6oj76BKQ7K

📍Free Courses, Jobs, Intermships Whatsapp Group 🔥 : https://whatsapp.com/channel/0029VamdH5mHAdNMHMSBwg1s

KPMG

Java OOP Concepts Cheat Sheet ☕📘

Master Java’s Object-Oriented pillars:

🔹 Class & Object
🔹 Inheritance
🔹 Polymorphism
🔹 Abstraction
🔹 Encapsulation

React ❤️ if you love clean Java code!

Java developer - Realistic Approach 💪🩵

1. Learn Java as a whole:
📍Beginner :
- Java Core: Java syntax , Collections framework , Exception Handling , Multithreading ,
File Handling
- Java Intermediate - JDBC , Design Pattern , Generics etc.

💪Pro :
- Advanced Java - Lambdas , streams , time , concurrency utilities , JVM internals
- Design Patterns - Creational , Structural , Behavioral

2. Build Tools:
- Learn and use popular build tools like :
📍Beginner : Maven (Web development) Gradle (App development)
💪Pro : Ant

3. Version Control:
- Master a version control system like Git. Master the skills for
📍Beginner : Github
💪Pro : GitLab , BitBucket

4. Command Line (This can be done parallel to the above 4)
Believe me when it comes to Java development Command line skills will be a boon for you guys.
Start with the basics for eg : install and setup java with Command Line only.

Start using Linux distributions ( it's very necessary ) go to a virtual box or dual boot your systems with any of Ubuntu , Kali Linux , Manjaro etc

5. Learn Servlets and JSP and then go for a framework ( Spring boot

Best Programming Resources: https://topmate.io/coding/898340

Join for more: https://t.me/programming_guide

ENJOY LEARNING 👍👍

29/100

Java Cheatsheet ✅

Typical java interview questions sorted by experience


Junior
* Name some of the characteristics of OO programming languages
* What are the access modifiers you know? What does each one do?
* What is the difference between overriding and overloading a method in Java?
* What’s the difference between an Interface and an abstract class?
* Can an Interface extend another Interface?
* What does the static word mean in Java?
* Can a static method be overridden in Java?
* What is Polymorphism? What about Inheritance?
* Can a constructor be inherited?
* Do objects get passed by reference or value in Java? Elaborate on that.
* What’s the difference between using == and .equals on a string?
* What is the hashCode() and equals() used for?
* What does the interface Serializable do? What about Parcelable in Android?
* Why are Array and ArrayList different? When would you use each?
* What’s the difference between an Integer and int?
* What is a ThreadPool? Is it better than using several “simple” threads?
* What the difference between local, instance and class variables?

Mid
* What is reflection?
* What is dependency injection? Can you name a few libraries? (Have you used any?)
* What are strong, soft and weak references in Java?
* What does the keyword synchronized mean?
* Can you have “memory leaks” on Java?
* Do you need to set references to null on Java/Android?
* What does it means to say that a String is immutable?
* What are transient and volatile modifiers?
* What is the finalize() method?
* How does the try{} finally{} works?
* What is the difference between instantiation and initialisation of an object?
* When is a static block run?
* Why are Generics are used in Java?
* Can you mention the design patterns you know? Which of those do you normally use?
* Can you mention some types of testing you know?

Senior
* How does Integer.parseInt() works?
* Do you know what is the “double check locking” problem?
* Do you know the difference between StringBuffer and StringBuilder?
* How is a StringBuilder implemented to avoid the immutable string allocation problem?
* What does Class.forName method do?
* What is Autoboxing and Unboxing?
* What’s the difference between an Enumeration and an Iterator?
* What is the difference between fail-fast and fail safe in Java?
* What is PermGen in Java?
* What is a Java priority queue?
* *s performance influenced by using the same number in different types: Int, Double and Float?
* What is the Java Heap?
* What is daemon thread?
* Can a dead thread be restarted?

Source: medium.