Online Business Builder

From Beginner To Full Stack Hero

Tag: Beginner

  • Unit Testing: The code you can trust

    Unit Testing: The code you can trust

    🧪 Unit Testing Unlocked: Write Confident, Reliable Code

    🧾 Course Description

    Unit testing is the foundation of reliable software development. It ensures that each piece of your application works as expected, reducing bugs and increasing confidence during updates, refactoring, and deployment.

    In “Unit Testing Unlocked”, you’ll learn the principles, tools, and practices of writing effective unit tests for functions, modules, and classes using popular frameworks like JUnit (Java), PyTest (Python), or Jest (JavaScript). This hands-on course helps developers of all levels build testable code with real-world examples, mock objects, test-driven development (TDD), and CI integration.

    ✅ Key Benefits

    • 🔒 Code with Confidence — Catch bugs early and prevent regressions
    • 🧠 Write Better Code — Testing improves architecture and design
    • 🚀 Refactor Fearlessly — Maintain clean code with long-term stability
    • 🔁 TDD-Ready Mindset — Build features by writing tests first
    • ⚙️ CI/CD Integrated — Automate testing as part of build pipelines

    🎯 Pre-requisites

    • Comfortable with a programming language (Java, Python, JavaScript, etc.)
    • Familiarity with functions, classes, and control flow
    • Optional: exposure to Git or build tools like Maven/npm is helpful
    • No prior testing experience required

    📚 Curriculum Breakdown

    📘 Module 1: Introduction to Unit Testing

    • What is unit testing? Why it matters
    • Unit tests vs integration, system, and E2E tests
    • Choosing a testing framework: JUnit, PyTest, Jest

    🧪 Module 2: Writing Your First Unit Test

    • Basic test structure: Arrange, Act, Assert
    • Asserting values and conditions
    • Running tests and viewing results

    📦 Module 3: Organizing Test Code

    • Test naming conventions and file structure
    • Setup and teardown methods
    • Grouping and parameterizing tests

    🔄 Module 4: Mocking & Dependency Injection

    • Why and when to mock
    • Using mock libraries (Mockito, unittest.mock, Jest Mocks)
    • Testing isolated units of code with fake dependencies

    🧱 Module 5: Test Coverage and Code Quality

    • Understanding coverage reports
    • Balancing test quality vs test quantity
    • Mutation testing (intro)

    🔁 Module 6: Test-Driven Development (TDD)

    • Red-Green-Refactor loop
    • Writing minimal code to pass tests
    • Refactoring with confidence

    🚦 Module 7: CI Integration and Automation

    • Running tests in CI pipelines (GitHub Actions, Jenkins, etc.)
    • Failing fast and triggering alerts
    • Badges, reports, and best practices

    🧪 Module 8: Final Project

    • Test Suite for a Mini App or Library
      • Write unit tests for business logic
      • Mock external dependencies
      • Achieve meaningful test coverage
      • Automate with CI tool (optional)

    ⏱️ Estimated Duration

    Daily Study TimeEstimated DurationIdeal For
    2 hours/day10–12 days (~2 weeks)Steady conceptual + hands-on
    4 hours/day5–6 days (1 week)Balanced pace with real examples
    6 hours/day3–4 days (bootcamp)Project-driven immersive learning

    🎓 Outcome

    By the end of Unit Testing Unlocked, you will:

    • Write robust unit tests for your codebase
    • Use mocks and test doubles for isolation
    • Understand how testing improves software quality
    • Integrate automated tests into CI pipelines for long-term stability
  • Java: Java Foundations for Programmers

    Java: Java Foundations for Programmers

    ☕ Java Foundations: Build Scalable Logic for Real-World Applications

    🧾 Course Description

    Java is one of the most powerful, reliable, and widely-used programming languages in the world — and a go-to language for enterprise systems, Android apps, web backends, and financial software.

    In “Java Foundations”, you’ll learn Java step by step, from basic syntax and OOP concepts to real-world application development. Designed for beginners and early-stage developers, this course builds a strong base in logic building, code structure, and problem-solving — setting the stage for advanced tools like Spring Boot, Android, or microservices.

    Whether you’re new to programming or transitioning from another language, this course will help you think like a developer and write clean, efficient Java code.

    ✅ Key Benefits

    • ☑️ Strongly Typed & Object-Oriented — Learn core principles of modern software design
    • 🧠 Structured Thinking — Ideal for building problem-solving and analytical skills
    • 🧩 Foundation for Spring, Android, and Backend Dev — Essential for tech careers
    • 🛠️ Hands-On Learning — Work on real examples and mini-projects
    • 🌍 Platform Independent — Learn a language used in global enterprises
    • 🚀 Boost Your Career — In demand for backend, finance, mobile, and more

    🧩 Curriculum Breakdown

    🔧 Module 1: Introduction to Java

    • What is Java? Why use it?
    • Java Development Kit (JDK) and setting up IntelliJ/Eclipse
    • First program: Hello World

    🔢 Module 2: Variables, Data Types & Operators

    • Primitive types: int, double, char, boolean
    • Type conversion and casting
    • Arithmetic and logical operators

    🔁 Module 3: Control Flow

    • if, else-if, switch-case
    • Loops: for, while, do-while
    • Nested structures

    🧠 Module 4: Object-Oriented Programming

    • Classes and Objects
    • Methods and Parameters
    • Constructors
    • Inheritance, Polymorphism, Encapsulation, Abstraction

    🗃️ Module 5: Arrays, Collections & Strings

    • Arrays: 1D and 2D
    • String manipulation and methods
    • Lists, Sets, and Maps (Intro to Java Collections Framework)

    ⚙️ Module 6: Exception Handling & File I/O

    • try-catch-finally blocks
    • Throwing exceptions
    • Reading/writing text files with FileReader/FileWriter or Scanner/PrintWriter

    🛠️ Module 7: Mini Projects

    • Project 1: Student Grade Calculator
    • Project 2: Library Management Console App
    • Project 3: Employee Payroll (uses arrays, loops, and classes)

    🎓 Outcome

    By the end of Java Foundations, you’ll:

    • Write clean, modular Java programs using OOP principles
    • Build mini-console applications with input/output and file handling
    • Be ready to learn Spring Boot, Android Development, or Java-based microservices
    • Understand how Java fits into large-scale system architectures
  • Node.js: Server-side starter pack

    Node.js: Server-side starter pack

    🔧 Server-Side Starter Pack: Learn Node.js from Scratch

    🧾 Course Description

    Every modern web application needs a brain — a backend that handles logic, data, and communication. In “Server-Side Starter Pack”, you’ll dive into Node.js, the powerful JavaScript runtime built for scalable, fast, and modern backend development.

    This beginner-friendly course teaches you how to build real-world backend services using Node.js, understand the request-response lifecycle, work with files, and build REST APIs from the ground up — all using JavaScript.

    If you’re already familiar with frontend JavaScript, this course will help you complete the picture and become a full-stack-ready developer.

    ✅ Key Benefits

    • 🖥️ Write Server Code in JavaScript — One language across frontend and backend
    • 🔁 Understand HTTP Internals — Learn how servers handle requests & responses
    • 📦 Use npm & Modules — Master package management and modularization
    • 🔗 Build REST APIs — Create endpoints and connect with frontends
    • 🛠️ Hands-On Projects — Apply concepts in real-world examples
    • 🚀 Foundation for Express, MongoDB, and Full-Stack Apps

    🧩 Curriculum Breakdown

    🔌 Module 1: Introduction to Node.js

    • What is Node.js and where is it used?
    • Setting up Node.js and npm
    • Writing your first server

    📁 Module 2: Core Modules & File System

    • Using fs, path, and os
    • Reading/writing files
    • Handling file uploads (intro)

    🔁 Module 3: Events & Streams

    • Understanding the EventEmitter pattern
    • Streams and buffers

    🌐 Module 4: HTTP Module & Web Servers

    • Creating a basic web server with http
    • Handling routes manually
    • Serving HTML pages

    🧱 Module 5: Working with npm

    • What is npm? How to use it
    • Installing and using third-party packages
    • Scripts and environment variables

    📦 Module 6: Building a REST API

    • Structuring an API
    • Creating endpoints (GET, POST, PUT, DELETE)
    • Sending JSON responses

    🛡️ Module 7: Error Handling & Middleware (Intro)

    • Synchronous and async error handling
    • Custom error messages
    • Introduction to middleware logic

    🧪 Module 8: Project – Build a Notes API

    • Full REST API with CRUD operations
    • Store notes in JSON (no database)
    • Test using Postman

    🎓 Outcome

    By the end of Server-Side Starter Pack, you’ll:

    • Understand how backend logic works using Node.js
    • Be able to create APIs for frontend apps
    • Be ready to dive into Express.js, MongoDB, or build complete MERN-stack apps
  • JavaScript: Think like a browser

    JavaScript: Think like a browser

    🧠 Think Like a Browser: Mastering JavaScript Basics

    🧾 Course Description

    JavaScript is the language that brings websites to life — from dropdown menus to form validation and animations. In “Think Like a Browser”, you’ll learn not just how JavaScript works, but why it works the way it does.

    This beginner-level course breaks down core JavaScript concepts into real-world use cases. You’ll learn to think like a browser and write scripts that interact with web pages, respond to user actions, and control behavior dynamically.

    By the end, you’ll be confidently writing scripts, debugging code, and ready to dive into modern JavaScript frameworks like React and Vue.

    ✅ Key Benefits

    • 💡 Foundational Course — Build core skills needed for frontend, full-stack, and app development
    • 🧠 Understand How Browsers Interpret Code — Gain mental models that make JS easier
    • 🛠️ Write Real Scripts — Create interactive pages, handle inputs, validate forms
    • 🧩 Practice DOM Manipulation — Learn how JavaScript connects HTML & CSS
    • 🐞 Debug with Confidence — Use browser dev tools like a pro
    • 🚀 Prep for React, Angular, or Full Stack — This is the launchpad

    🧩 Curriculum Breakdown

    📘 Module 1: Introduction to JavaScript

    • What is JavaScript?
    • Where it runs (browser vs server)
    • Adding JavaScript to HTML (inline, script tag, external file)

    🔢 Module 2: Variables & Data Types

    • let, const, var
    • Strings, numbers, booleans
    • Type conversion and coercion

    ⚙️ Module 3: Operators & Control Flow

    • Arithmetic, comparison, logical operators
    • if-else, switch-case, conditional logic
    • Loops: for, while, do…while

    🧮 Module 4: Functions & Scope

    • Function declarations and expressions
    • Parameters, arguments, return values
    • Scope (global vs local), closures (intro)

    📦 Module 5: Arrays & Objects

    • Array methods: push, pop, map, filter
    • Object structure, properties, methods

    🌐 Module 6: The Document Object Model (DOM)

    • Selecting and modifying elements
    • Event listeners and handlers
    • Forms and user input

    🐞 Module 7: Debugging & Dev Tools

    • Using console, breakpoints
    • Error handling with try-catch

    🔨 Module 8: Mini Project

    • Build an Interactive Quiz Web App
      Includes:
      • Dynamic question rendering
      • Scoring system
      • Input validation
      • Styling with CSS

    🎓 Outcome

    By the end of Think Like a Browser, you’ll:

    • Understand how JS powers modern websites
    • Use functions, arrays, objects, and events effectively
    • Be able to build dynamic browser-based apps
    • Be ready for JavaScript frameworks like React, Vue, and Node.js