Uber Automation Testing Interview Questions & Answers

TestNG reports, ExtentReports and Allure give charts, screenshots and logs that are easy to share with the team.

Use then().statusCode(200).body("data.id", equalTo(5)), or extract() the response and assert fields with JsonPath.

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

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

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

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

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

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.

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.

An interface for systems to talk to each other. GET reads, POST creates, PUT replaces, PATCH updates partially and DELETE removes.

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.

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

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

Use the Select class with selectByVisibleText, selectByValue or selectByIndex; for custom dropdowns click and choose from the list of elements.

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

Use then().time(lessThan(2000L)) and then().header("Content-Type", containsString("json")) along with body assertions.

Classes such as Integer and Double that wrap primitive types as objects, needed for collections and for parsing text from web elements.

Git tracks changes, enables code review, branching and rollback and lets teams collaborate on the framework safely.

Code pushed to Git → Jenkins job triggers (webhook or schedule) → mvn clean test with the suite XML → reports and screenshots published → notifications on Slack/email → failures triaged before release.

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

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

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.

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

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

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

200 OK, 201 Created, 204 No Content, 400 Bad Request, 401 Unauthorized, 403 Forbidden, 404 Not Found, 500 Internal Server Error.

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

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

findElement returns the first match and throws NoSuchElementException if nothing is found. findElements returns a List (empty if nothing is found) — handy to check whether an element exists.

Docker packages tools in containers so tests run identically everywhere; Selenium Grid and browsers can be started quickly in containers.

throw actually raises an exception object inside a method; throws declares in the method signature that it may pass an exception to the caller.

Keep credentials in external data, parameterise the test with a data provider, reuse a login method in a page class, and clear sessions between roles.

@BeforeTest runs once before all methods in a test tag of testng.xml; @BeforeMethod runs before every test method.

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

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

An abstract class can hold state and concrete methods; an interface defines a contract (with default methods since Java 8). A class extends one abstract class but can implement many interfaces.

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.

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

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

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

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

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.

200 OK, 201 Created, 400 bad request, 401 unauthenticated, 403 forbidden, 404 not found and 500 server error.

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

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

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

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

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

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.

Hard assert stops the test at the first failure; SoftAssert collects failures and reports them together when assertAll() is called.

A subclass redefines a parent method. Frameworks use it to customise base behaviour, such as overriding a wait or click method in a base page class.

Use isDisplayed(), isEnabled() and isSelected() on the WebElement before interacting or asserting.

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.