Xylem Water Solutions QA Engineer Interview Questions, Process, and Tips

Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.

• Abstract class can have constructors, fields, and non-abstract methods along with abstract methods.

• Interfaces can only have abstract methods and constants, no constructors or fields.

• An abstract class can provide a default implementation for some methods, while an interface cannot.

• An abstract class can be exten...read more

findelement returns the first matching element on the page, findelements returns a list of all matching elements.

• findelement returns a single WebElement, findelements returns a list of WebElements

• findelement throws NoSuchElementException if no element is found, findelements returns an empty list

• Example: driver.findElement(By.id("exampleId")) vs driver.findElements(By.className("exampleClass"))

Test scenarios for Facebook login page

• Verify login with valid credentials

• Verify login with invalid credentials

• Verify login with empty username and password fields

• Verify login with incorrect password

• Verify login with incorrect username

• Verify login with special characters in username and password

• Verify login with locked account

• Verify login with expired password

• Verify login with CAPS LOCK on

• Verify login with multiple logi

Regression testing ensures that new code changes do not adversely affect existing functionality, while integration testing checks if different modules work together correctly.

• Regression testing focuses on retesting existing functionality after code changes

• Integration testing checks if different modules work together as expected

• Regression testing is usually automated to save time and effort

• Integration testing may involv...read more

Program to remove white spaces from string without any inbuilt function

• Iterate through each character in the string

• Create a new string and add non-white space characters to it

• Return the new string without white spaces

To validate if a checkbox is checked, use Selenium WebDriver to locate the checkbox element and then use the isSelected() method to check if it is checked.

• Locate the checkbox element using Selenium WebDriver

• Use the isSelected() method to check if the checkbox is checked

• Assert the result to validate if the checkbox is checked

To validate the button color, inspect the CSS properties or use a color picker tool.

• Inspect the CSS properties of the button element to check the color value

• Use a color picker tool to sample the color of the button on the UI

• Compare the sampled color with the expected blue color value

You can validate data presence in a table using Selenium by locating the table element and then searching for the desired value.

• Locate the table element using Selenium WebDriver

• Iterate through the rows and columns of the table to find the desired value

• Use assertions to validate if the value is present in the table

No, in Java you cannot overload/override functions based on return types.

• In Java, method overloading is based on the number and type of parameters, not the return type.

• Method overriding is based on the method signature, which includes the method name, parameter types, and order, but not the return type.

• Attempting to overload or override a method based solely on return type will result in a compilation error.

PUT is used to update or replace an entire resource, while PATCH is used to update or modify a part of a resource.

• PUT is idempotent, meaning multiple identical requests will have the same effect as a single request.

• PATCH is not necessarily idempotent, as multiple identical requests may have different effects.

• PUT requires the client to send the entire updated resource, while PATCH only requires the client to send the sp...read more

Use recursion to print numbers from 1 to 1000 without using loops

• Create a recursive function that takes a number as input

• Print the number and call the function with the next number until 1000 is reached