Preparation kit for automation test engineer (Skill set: selenium + java)

timepaas September 17, 2025

 You want a preparation kit that focuses on your relevant experience in Selenium + Java, framework knowledge, CI/CD tools, and project/domain knowledge (BFSI, Healthcare, E-commerce, etc.).

Here’s a structured preparation kit you can use for interview prep 👇

🔹 Selenium + Java Preparation Kit

1. Core Java (for Automation)

  • OOP concepts (Inheritance, Polymorphism, Abstraction, Encapsulation)

  • Collections Framework (List, Set, Map, Queue, Iterators, Streams API)

  • Exception Handling (Checked vs Unchecked, try-catch-finally, throw/throws)

  • Java 8+ Features (Lambda, Streams, Functional Interfaces)

  • File Handling (Read/Write Excel, Properties, JSON, XML)

  • Multithreading (Thread class, Runnable, ExecutorService basics)

  • String & Regex (common manipulations for test validations)

2. Selenium WebDriver

  • Selenium architecture (JSON Wire Protocol / W3C WebDriver Protocol)

  • Locators strategy (id, name, xpath, cssSelector, linkText, etc.)

  • Handling dynamic elements & waits (Explicit vs Implicit vs Fluent Waits)

  • Actions class (mouse hover, drag-drop, keyboard events)

  • Frames, Windows, Alerts handling

  • JavaScriptExecutor (scroll, click, get value)

  • Headless browser execution

  • Cross-browser testing (Chrome, Edge, Firefox)

  • Page Object Model (POM) & Page Factory

  • Handling Shadow DOM and stale element exceptions

3. Frameworks

🔸 TestNG

  • Annotations (@Test, @BeforeSuite, @AfterMethod etc.)

  • DataProvider for parameterization

  • Assertions (hard vs soft)

  • TestNG.xml (parallel execution, grouping, dependencies)

  • Reporting (Extent Reports, Allure, TestNG Reports)

🔸 Cucumber (BDD)

  • Gherkin syntax (Feature, Scenario, Scenario Outline, Examples)

  • Step Definitions (glue code in Java)

  • Hooks (@Before, @After)

  • DataTables for passing test data

  • Running with TestNG/JUnit

  • Tags & Filtering scenarios

  • Generating Reports (Allure, Extent, JSON)

🔸 Hybrid Framework

  • Page Object Model + TestNG + Cucumber

  • Utility classes (Excel/JSON readers, WebDriver utils, Config manager)

  • Base classes (driver setup, teardown, logging)

  • Integration of reporting tools

  • Reusability & maintainability best practices

4. CI/CD Tools & Build Management

  • Maven

    • POM.xml dependencies

    • Build lifecycle (clean, compile, test, package, install, deploy)

    • Plugins (Surefire, Failsafe, Compiler)

    • Dependency management

  • Git/GitHub/GitLab

    • Git workflow (clone, commit, push, pull, branch, merge)

    • Pull requests, conflict resolution

    • Version control best practices

  • Jenkins

    • Freestyle vs Pipeline Jobs

    • CI/CD integration with Selenium

    • Triggers (SCM, Polling, Webhooks)

    • Jenkinsfile (Declarative vs Scripted pipeline)

    • Report publishing in Jenkins

5. Project/Domain Relevance

When explaining projects, structure it like this:

  • Domain: BFSI / Healthcare / E-commerce

  • Project: (e.g., Banking Loan Management System, Patient Portal, Shopping Cart)

  • Your Role:

    • Automation test planning & scripting

    • Framework design & enhancement

    • CI/CD integration for automated regression

    • Defect logging & tracking (JIRA, Azure DevOps, etc.)

  • Key Contributions:

    • Optimized regression suite → reduced execution time by X%

    • Implemented Hybrid framework with TestNG + Cucumber

    • Integrated Jenkins pipeline for nightly runs

    • Handled cross-browser & parallel execution

6. Common Interview Q&A

  • Explain your framework architecture.

  • How do you handle dynamic elements in Selenium?

  • How do you integrate Selenium with Jenkins?

  • Difference between TestNG & Cucumber? When to use which?

  • How do you manage test data in your framework?

  • Challenges faced in your project & how you solved them.

  • CI/CD pipeline flow in your project.

  • Domain-specific testing challenges (e.g., BFSI → transaction validation, Healthcare → HIPAA compliance, E-commerce → cart & payment gateway testing).

7. Hands-On Practice

  • Write automation for:

    • Login → Add item to cart → Checkout (E-commerce flow)

    • User registration & validation (Healthcare portal)

    • Fund transfer validation (BFSI flow)

  • Build a Hybrid Framework with:

    • Selenium + Java + TestNG + Cucumber + Maven + Extent Reports

  • Push it to GitHub & integrate with Jenkins

timepaas

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