Software Testing Tutorial

What is Software Testing? Software testing is the process of evaluating a system to check whether it meets the specified requirements and to find defects. Testing answers two ...

SDLC - Software Development Life Cycle SDLC describes how software is built: Requirement Analysis, Design, Coding, Testing, Deployment, Maintenance. Common models: Waterfall ...

Manual vs Automation Testing Manual - a human executes cases; best for new features, UI/UX feel, exploratory work. Automation - scripts execute cases; best for regression, ...

Unit Testing Test the smallest piece (a method or class) in isolation, with dependencies mocked. Written by developers with JUnit/TestNG; runs in milliseconds on every commit. ...

Black Box Testing Test behaviour without seeing code: give inputs, check outputs. Techniques below are all black box. White Box Testing Test with code knowledge: statement, branch ...

What is a Test Case? A test case is a documented set of steps, data and expected results used to verify one behaviour. Test Scenario is the what (verify login); Test Case is the ...

Test Plan The project-level document: scope, objectives, schedule, resources, environments, entry/exit criteria, risks and deliverables. One plan per release. Test Strategy The ...

What is a Software Bug? Any deviation from requirements: wrong output, crash, broken link, confusing message. All bugs get logged, triaged, fixed and verified. Bug Life Cycle New ...

Agile Testing Introduction In Agile, testing happens inside every sprint, not after development. Testers join planning, write cases from user stories, automate continuously and ...

Introduction to API Testing APIs carry the real logic; UI just displays it. Testing APIs directly is faster, stabler and finds backend bugs before any page exists. HTTP Methods ...

Introduction to Selenium Selenium WebDriver drives real browsers through code. With Java it is the industry standard stack for UI regression suites. Setup (Maven) First Test ...

Introduction to TestNG TestNG organises tests with annotations, groups, parallel runs and rich HTML reports. It is the runner behind most Java Selenium frameworks. Annotations ...

Introduction to JUnit 5 JUnit 5 (Jupiter) is the standard for Java unit tests: @Test, lifecycle hooks and expressive assertions, running under Maven Surefire. Annotations and ...

Introduction to Performance Testing Load - expected users (500 concurrent checkouts). Stress - beyond capacity until it breaks; find the ceiling. Endurance/Soak - long runs catch ...

Introduction to Security Testing Security testing proves the app resists attackers: authentication, authorisation, input handling, sessions and crypto. Every tester should know ...

Introduction to Database Testing UIs lie; databases do not. Verify that every action writes correct, complete rows and that bad actions write nothing. SQL Every Tester Must Know ...

Introduction to CI/CD Testing Continuous Integration builds and tests every push; Continuous Delivery keeps every green build releasable. QA gates the pipeline: red tests block ...

AI in Software Testing Test case generation - LLMs draft cases from user stories; testers review and harden them. AI-assisted automation - self-healing locators survive UI ...

Why Projects Beat Theory Employers hire proof. Five documented projects with test cases, bug reports and CI badges beat any certificate. Publish everything on GitHub. Project 1: ...

How to Use This Guide Questions are grouped by topic with counts. Learn the concept behind each group from the matching lesson, then answer aloud in 60 seconds with one example. ...