ServiceNow Senior Quality Engineer Interview Questions and Answers

Object-oriented programming concepts used in framework design

• Inheritance: Allows classes to inherit attributes and methods from other classes

• Encapsulation: Bundling data and methods that operate on the data into a single unit

• Polymorphism: Ability to present the same interface for different data types

• Abstraction: Hiding the complex implementation details and showing only the necessary features

To select a dropdown in Selenium, use the Select class and its methods like selectByVisibleText, selectByValue, or selectByIndex.

• Use the Select class from org.openqa.selenium.support.ui package

• Identify the dropdown element using findElement method

• Create a new Select object by passing the dropdown element as a parameter

• Use selectByVisibleText, selectByValue, or selectByIndex methods to choose an option

findelement is used to find a single element on a webpage, while findelements is used to find multiple elements.

• findelement returns the first matching element on the webpage

• findelements returns a list of all matching elements on the webpage

• Example: driver.findElement(By.id("elementId")) vs driver.findElements(By.className("elementClass"))

The main method in Java can be overloaded but not overridden.

• Main method can be overloaded by defining multiple main methods with different parameters.

• Overloading allows multiple methods with the same name but different parameters.

• Main method cannot be overridden because it is a static method and static methods cannot be overridden.

I worked on a project to develop a mobile application for tracking fitness goals and workouts.

• Tested user authentication and registration processes

• Performed functional testing on workout tracking features

• Conducted regression testing after each new feature implementation

Regression testing is retesting of software to ensure that recent changes have not adversely affected existing features. Regression defects are bugs that reappear after changes.

• Regression testing is performed to make sure that new code changes have not introduced any new bugs or caused existing functionalities to break.

• It involves re-executing test cases that cover the impacted areas of the software.

• Regression defects ...read more

Verification ensures the product is built right, while validation ensures the right product is built.

• Verification focuses on process, validation focuses on product

• Verification answers 'Are we building the product right?'

• Validation answers 'Are we building the right product?'

• Verification is done before validation

Regression tests are run after every significant code change or new feature implementation.

• Regression tests are typically run after every significant code change or new feature implementation to ensure that existing functionalities are not affected.

• The frequency of running regression tests may vary depending on the project timeline and release cycle.

• In Agile development, regression tests are often run as part of the co...read more

To select the 5th dropdown option, locate the dropdown element and choose the 5th option.

• Locate the dropdown element using its unique identifier or class name

• Use a method like 'selectByIndex' or 'selectByVisibleText' to choose the 5th option

• Verify that the correct option has been selected

Use xpath to locate Google Search tab and Voice search button on the webpage.

• For Google Search tab: //input[@name='btnK']

• For Voice search button: //div[@aria-label='Search by voice']

Java program to reverse a string without using predefined methods.

• Create a char array from the input string.

• Use two pointers, one at the start and one at the end, to swap characters.

• Continue swapping characters until the pointers meet in the middle.

Some common libraries used for verifying test cases are JUnit, TestNG, Selenium, and RestAssured.

• JUnit is a popular Java testing framework for unit testing.

• TestNG is another Java testing framework that supports parameterized and data-driven testing.

• Selenium is a widely used tool for automating web browsers for testing purposes.

• RestAssured is a Java library for testing RESTful APIs.

Validate input by checking for specific error messages instead of success message

• Check for error messages related to incorrect input (e.g. 'Invalid username/password')

• Verify the response code or status returned after login attempt

• Look for any specific patterns in the error messages that indicate incorrect input

Program to remove all spaces from a sentence

• Iterate through each character in the sentence

• If the character is not a space, add it to a new string

• Return the new string without spaces