MOMO Academy Study Handbook
SDET & QA Automation 2026 Edition

Automation Testing with Java & Selenium WebDriver 4

Enterprise Test Architecture, Page Object Model, Cucumber BDD, REST Assured, and CI/CD Pipelines

Publisher: MOMO IT Technologies
Headquarters: Krishnapuram, Kadapa, AP
Website: momoittechnologies.com
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Module 1: Software QA & Testing Fundamentals

1.1 SDLC vs STLC

SDLC (Software Development Life Cycle): The overall process of planning, designing, coding, testing, and deploying software.

STLC (Software Testing Life Cycle): The focused phase dedicated exclusively to quality assurance:

  1. Requirement Analysis: Identify testable user stories and acceptance criteria.
  2. Test Planning: Scope, resources, timelines, and testing tools.
  3. Test Case Development: Step-by-step test scripts with preconditions and expected results.
  4. Test Environment Setup: Web browsers, OS matrices, database fixtures.
  5. Test Execution: Running automated regression suites and logging defect logs.
  6. Defect Closure & Sign-Off: Retesting resolved bugs in Jira and certifying release readiness.

1.2 Black-Box Test Design Techniques

Module 2: Core Java for Automation Architects

2.1 The 4 OOP Pillars in Real Automation

Pillar Definition Practical Application in Selenium
Encapsulation Wrapping variables and methods together; keeping locators private. Page Object Model: Web elements (By) are private; exposed via public action methods.
Inheritance Child class inheriting fields and behavior from parent class. TestBase manages WebDriver lifecycle; all test classes extend TestBase.
Polymorphism One interface, multiple implementations. WebDriver driver = new ChromeDriver(); (Overriding). frame(int) vs frame(String) (Overloading).
Abstraction Hiding internal driver complexity behind clean APIs. Using WebDriver interface instead of binding to concrete browser classes.

Module 3: Selenium WebDriver 4 Architecture & Strategies

Selenium 4 completely eliminated the legacy JSON Wire Protocol. WebDriver now communicates natively with browser drivers using the W3C Standard Protocol, resulting in faster and flakeless test execution.

3.1 Resilient XPath Strategies

// 1. Text-based locator
//button[text()='Submit Order']

// 2. Contains attribute for partial matching
//input[contains(@placeholder, 'Enter mobile number')]

// 3. Normalized whitespace
//button[normalize-space()='Login']

// 4. Following-sibling axis
//label[text()='Email']/following-sibling::input

Module 4: Page Object Model (POM) Design Pattern

public class LoginPage {
    private WebDriver driver;
    private WebDriverWait wait;

    // 1. Private Locators
    private By phoneInput = By.xpath("//input[@placeholder='Enter phone']");
    private By submitBtn = By.xpath("//button[contains(., 'Continue')]");

    // 2. Constructor
    public LoginPage(WebDriver driver) {
        this.driver = driver;
        this.wait = new WebDriverWait(driver, Duration.ofSeconds(10));
    }

    // 3. Public Business Methods
    public void enterPhoneNumber(String phone) {
        wait.until(ExpectedConditions.visibilityOfElementLocated(phoneInput)).sendKeys(phone);
    }

    public void clickContinue() {
        wait.until(ExpectedConditions.elementToBeClickable(submitBtn)).click();
    }
}

Module 5: Top 5 MNC Interview Questions & Answers

Q1: What is the difference between driver.close() and driver.quit()?
driver.close() terminates the currently focused browser tab. driver.quit() destroys all browser windows and shuts down the background WebDriver process.
Q2: How do you fix StaleElementReferenceException?
It happens when an element is destroyed and re-rendered in the DOM. Solution: Relocate the element dynamically inside an explicit wait retry mechanism using ExpectedConditions.refreshed(...).
Q3: Why should you never mix Implicit Wait and Explicit Wait?
Mixing them causes indeterminate timeout behavior in W3C WebDriver, causing unpredictable hangs and inflated test execution times.

Module 6: Freelancing QA Blueprint

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