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Atlassian Automation Testing Interview Questions & Answers

Curated interview practice questions with answers. These are practice scenarios, not a verified list of past interview questions.

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01

How would you design an automation framework from scratch?

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Maven project → POM with a BasePage → driver factory with ThreadLocal → config files → data-driven utilities (Excel/JSON) → TestNG or Cucumber runner → logging → Extent reports with screenshots on failure → Jenkins pipeline.
02

How do you scroll a page in Selenium?

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Use JavascriptExecutor with window.scrollTo or scrollIntoView, or the Actions class scroll methods in Selenium 4.
03

What are Java 8 streams and lambdas?

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Lambdas are short anonymous functions; streams process collections declaratively with filter, map and collect, for example filtering link text from a list of elements.
04

How do you retry failed tests in TestNG?

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Implement IRetryAnalyzer with a retry count and attach it through the test annotation or a listener to rerun flaky tests.
05

What are access modifiers in Java?

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public (everywhere), protected (package and subclasses), default (package) and private (same class), used to control visibility of test utilities.
06

How do you read data from Excel or properties files in Java?

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Use Apache POI for Excel and the Properties class for config files, loaded in a utility class so tests read data instead of hard-coding it.
07

How do you make WebDriver thread-safe for parallel runs?

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Store each driver in a ThreadLocal so every thread gets its own instance and tests do not interfere.
08

How would you design a CI pipeline for nightly regression?

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Schedule the job, spin up environments or containers, run suites in parallel, store reports and screenshots, notify failures on Slack or email and track trends.
09

What is contract testing?

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Verifying that a provider and consumer agree on request and response formats, using tools like Pact, to catch breaking changes early.
10

What are relative locators in Selenium 4?

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Locators such as above, below, toLeftOf and near that find elements by their position relative to another element.
11

What is a DataProvider in TestNG?

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@DataProvider returns Object[][]; a @Test(dataProvider = "name") method runs once per row — the basis of data-driven tests, often reading Excel or JSON.
12

What are try-with-resources and why use them?

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A try block that automatically closes resources such as file readers or streams, preventing leaks without a finally block.
13

What is the purpose of testng.xml?

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A configuration file to define suites, tests, classes, groups, parameters and parallel execution settings.
14

How does HashMap work internally?

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It uses the key's hashCode to find a bucket and equals to resolve collisions, giving O(1) average lookups; Java 8 converts long buckets into trees.
15

What are Java collections and which ones do testers use most?

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ArrayList and LinkedList for lists, HashSet for unique values, HashMap for key-value test data, and Iterator for traversing them, for example collecting web elements in a list.
16

What is the difference between Comparable and Comparator in Java?

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Comparable defines the natural order inside the class (compareTo); Comparator defines custom orders externally (compare), useful for sorting test data in several ways.
17

How do you run tests in parallel?

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Use TestNG parallel="methods | classes | tests" with thread-count, keep WebDriver in a ThreadLocal, and use Selenium Grid or a cloud grid for multiple browsers.
18

What is the use of the this and super keywords?

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this refers to the current object; super refers to the parent class, used to call parent constructors and methods.
19

How do you handle StaleElementReferenceException?

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Re-locate the element after the DOM refreshes, use explicit waits for the refreshed element, don't keep element references for long, or wrap the action in retry logic.
20

How do you handle multiple windows?

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String parent = driver.getWindowHandle(); for (String h : driver.getWindowHandles()) if (!h.equals(parent)) driver.switchTo().window(h); // ...then switch back to parent
21

ArrayList vs HashMap — how do you use them in a framework?

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ArrayList stores an ordered list (e.g. all product names on a page). HashMap stores key–value pairs (e.g. test data or config properties).
22

POST vs PUT vs PATCH?

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POST creates a resource, PUT replaces the whole resource (idempotent) and PATCH updates part of it.
23

What are the main OOP concepts in Java?

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Encapsulation, inheritance, polymorphism and abstraction. Testers use them to build reusable page classes, base tests and utility libraries.
24

Where do you use OOP concepts in your framework?

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Encapsulation: private locators with public page methods. Inheritance: pages extend a BasePage. Polymorphism: the WebDriver interface for different browsers. Abstraction: utility layers hiding Selenium details.
25

How do you decide what to automate?

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Automate stable, repetitive, high-risk and data-heavy flows (smoke, regression). Skip one-time tests, frequently changing UI and checks needing human judgement. Compare run frequency × manual time with build and maintenance cost.
26

What are the different types of waits in Selenium?

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Implicit, explicit (WebDriverWait with ExpectedConditions) and fluent waits; avoid mixing implicit and explicit waits and never rely on Thread.sleep.
27

String vs StringBuilder?

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String is immutable — every change creates a new object. StringBuilder is mutable and faster for repeated changes (not thread-safe; StringBuffer is).
28

What is data-driven testing?

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Running the same test logic with multiple data sets from Excel, CSV, JSON or a database, so coverage increases without duplicating code.
29

Reverse a string in Java.

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String r = new StringBuilder(s).reverse().toString(); // or loop from the last index and append each character
30

What is the difference between SOAP and REST?

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SOAP is a strict XML protocol with WSDL and WS-Security; REST is a lighter architectural style using HTTP and usually JSON.
31

How do you handle a test that is flaky only in headless mode?

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Set window size explicitly, use proper waits, check animations and viewport differences, and capture screenshots and logs to find timing issues.
32

How do you handle environment-specific configuration?

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Keep URLs and credentials in per-environment config files or variables, choose with a command-line parameter and never hard-code secrets.
33

How do you test an API that depends on another service that is down?

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Use mocks or stubs such as WireMock to simulate the dependency and test your service in isolation.
34

What is the difference between driver.close() and driver.quit()?

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close() closes the current window; quit() closes all windows and ends the driver session.
35

What is OAuth 2.0 in API testing?

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An authorisation framework where a client obtains an access token from an auth server and sends it as a Bearer token; tests fetch and reuse the token in setup.
36

How do you integrate Selenium tests with Jenkins?

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Create a job or pipeline that checks out code, runs mvn test, publishes reports and triggers on commits or schedules.
37

How do you manage test data in a framework?

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Use external files or APIs and database setup scripts, generate unique data per run, and clean up afterwards so tests stay independent.
38

What is PageFactory?

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A helper that initialises @FindBy elements lazily using initElements; some teams skip it in favour of plain By locators.
39

Write a GET test in REST Assured.

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given().baseUri(url) .when().get("/users/1") .then().statusCode(200).body("id", equalTo(1));
40

What are exceptions and how do you handle them?

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Runtime events that disrupt flow. Use try-catch-finally, throw, throws, and custom exceptions; checked exceptions must be handled while unchecked ones need not be.
41

How do you pass authentication in an API test?

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Use headers such as Bearer tokens, basic auth, API keys or OAuth flows; fetch a token in a setup step and reuse it.
42

How do you handle iframes?

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switchTo().frame(index, name or element) enters the frame, and switchTo().defaultContent() returns to the main page.
43

How do you handle alerts and pop-ups?

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driver.switchTo().alert() lets you accept, dismiss, read text or send keys. Browser windows are handled with window handles.
44

What is the difference between == and equals() in Java?

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== compares references (or primitive values); equals() compares content when overridden, as in String.
45

What is CI/CD and why does automation need it?

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Continuous Integration builds and tests every commit, and Continuous Delivery ships automatically. Automated tests give fast feedback and gate releases.
46

What are the Actions class use cases?

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Mouse and keyboard actions such as hover, drag and drop, double click, right click and key combinations, built with moveToElement(...).perform().
47

What is the difference between getText() and getAttribute()?

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getText returns visible inner text; getAttribute returns an HTML attribute or property such as value, href or class.
48

How do you handle dynamic elements whose ids change?

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Use CSS or XPath with contains(), starts-with() or stable attributes, relative axes, or data-test attributes agreed with developers.
49

What does dependsOnMethods do?

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It makes a test run only after specified tests pass, otherwise it is skipped. Use sparingly as it creates coupled tests.
50

Write an XPath for a button with the text "Login".

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//button[normalize-space()='Login'] //button[contains(text(),'Login')]
51

How do you handle a dropdown that is not a <select> tag?

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Click to open the dropdown, then locate the option by its text, e.g. //li[text()='India'], and click it. Add an explicit wait for the animation.
52

What is TestNG and why is it used with Selenium?

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A test framework offering annotations, grouping, prioritisation, parallel runs, data providers and reports, which structure and scale Selenium tests.
53

Difference between ArrayList and LinkedList?

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ArrayList has fast random access and slower inserts in the middle; LinkedList has fast inserts and deletes but slow access by index.
54

What is a Jenkins pipeline?

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A scripted or declarative Jenkinsfile that defines stages such as build, test and deploy as code stored with the project.
55

How do you calculate automation ROI?

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Compare effort saved by running automated tests repeatedly against the cost of building and maintaining scripts, counting execution time, defects found earlier and release speed.
56

Implicit vs explicit vs fluent wait?

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Implicit wait applies globally to element lookups. Explicit wait waits for a specific condition (WebDriverWait + ExpectedConditions). Fluent wait is an explicit wait with custom polling and ignored exceptions.
57

Tests pass locally but fail on Jenkins. Why?

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Headless mode or screen resolution, timing issues, environment data, missing dependencies, browser–driver version mismatch or parallel conflicts. Check logs and failure screenshots and make waits robust.
58

What is JSON and how is it used in API testing?

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A lightweight text format of key-value pairs and arrays used in API requests and responses, validated field by field in tests.
59

What are listeners in TestNG?

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Classes like ITestListener that react to events such as test start, success or failure, commonly used for screenshots and reporting.
60

Difference between final, finally and finalize?

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final makes a variable, method or class unchangeable; finally is a block that always runs after try-catch; finalize is a deprecated method called before garbage collection.
61

How do you pass parameters from testng.xml?

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Define parameter name and value in the XML and read them with @Parameters in the test or configuration method.
62

What is the use of Maven in automation projects?

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It manages dependencies through pom.xml, builds the project, runs tests with Surefire and standardises structure across teams.