SDET Interview Questions Selenium

SDET Interview Questions: As software development has become more complex, the Software Development Engineer in Test (SDET) role has become an essential part of the software development process. An SDET is responsible for testing software applications, identifying and reporting bugs, and ensuring the software meets the requirements and specifications.

When interviewing for an SDET position, candidates should expect questions designed to test their technical knowledge, problem-solving skills, and understanding of testing methodologies. These questions can cover various topics, from programming languages and algorithms to testing frameworks and software design patterns. In this article, we will explore some common SDET interview questions that candidates may encounter during the hiring process.

In addition to technical knowledge and problem-solving skills, SDET interview questions may assess a candidate’s ability to collaborate with other software development team members, communicate effectively, and adapt to changing requirements and timelines. Hiring managers may also ask about candidates’ experience with agile methodologies, continuous integration and delivery, and test automation frameworks.

Some common technical topics that may be covered in SDET interview questions include data structures, algorithms, software architecture patterns, database management, and web application security. Additionally, candidates may be asked to demonstrate their proficiency with specific programming languages such as Java, Python, or C# and testing frameworks such as Selenium, Appium, or JUnit.

By preparing for these questions in advance, SDET candidates can increase their chances of impressing hiring managers and securing a position in this exciting and rewarding field.

SDET Interview Questions Java

  • What is oops concept
  • Explain the main() method.
  • Explain system.Out.Println();
  • Explain polymorphism
  • What is encapsulation
  • What is constructor
  • Write a program for string anagram.
  • Program for string reverse
  • Program for integer reverse
  • Program to find the count for the duplicate character in a string
  • Program for removing duplicates from a string
  • Program for palindrome
  • What is the difference between string and StringBuffer
  • What is the difference between immutable and mutable
  • Difference between ==operator and .Equals() method.
  • What is a static constant pool?
  • Difference between interface and abstract class
  • What is the difference between Break and Continue
  • Overloading and overriding
  • Difference between array and ArrayList
  • Difference between list and set
  • Explain the oops concepts used in the framework.
  • What is abstraction? How you implemented abstraction in your framework
  • Abstract class vs interface
  • What is a static method? How will you call a static method
  • What is a static variable? What will you call it?
  • What’s the use of abstract class
  • What’s the use of an interface
  • Local variable vs instance variable
  • How you implemented polymorphism in your framework? With an example
  • What is method overloading? How will you implement it? With an example
  • What’s the method overriding? How will you do it?
  • Why is the main method static?
  • Length vs length() difference
  • What are collections?
  • Set vs ArrayList
  • What’s a hashmap? Why do we use hashmap
  • Private vs protected difference
  • Program to print the number of occurrences of each character in the string “Abcdab”
  • Write a program for string reverse.
  • Write a program for Fibonacci.
  • Write a program to check whether a number is a prime.
  • Does java support multiple inheritances?
  • Write a code for the number of characters in a string.
  • How to connect java application with oracle database
  • Difference between interface and abstract class
  • Can we execute java code without main()
  • Oops concept and difference between overloading and overriding
  • Find the top from the array list(10 numbers) using the java code
  • Check logic for the Fibonacci series, even/odd number, the top value from the 5th number.
  • What are the access modifier and differences? Public, private, protected, default
  • What is an abstract class with an example
  • Polymorphism
  • Inheritance
  • Collection-set, list, map
  • Exception-exception, error, assertion
  • The oops-type casting of object
  • Wrapper classes

SDET Interview Questions Selenium

  • Explain your framework
  • What is the sequence of TestNG annotations
  • Dataprovider annotations and their uses
  • Parallel execution in selenium
  • Explain selenium grid
  • Explain assertions, hard assertions, and soft assertions.
  • Explain you framework
  • Absolute vs relative XPath
  • How to get all the sibling elements
  • Questions on XPath techniques
  • How to come out of a frame?
  • How to handle popup
  • How to check whether an alert is available?
  • How to find hidden elements
  • How does the mouse hover over elements
  • What is a webdriver? How it works
  • How to implement scrolling in selenium
  • How to handle multiple windows
  • What is the return type of getwindowhandles
  • How to handle drop-down
  • How to skip specific test cases while executing using TestNG
  • TestNG annotations
  • Use of listener and reporter
  • Parameterization in TestNG
  • Describe the framework design & overall flow diagram used in your project.
  • How to handle windows authentication popups with & without using third-party tools.
  • What are the different types of exceptions in selenium webdriver?
  • What are the different types of methods in selenium?
  • Can we enter text without using sendkeys()? If yes, how?
  • How to find more than one web element in the list?
  • What is the difference between driver.Close() and driver.Quit command?
  • What is the difference between findelement/findelements?
  • How to count the number of links on a page?
  • Difference between assert and verify in selenium webdriver
  • How to take a screenshot using selenium webdriver?
  • How will you execute your login script using the chrome browser from your editor using selenium?
  • Can we use multiple catch block inside a try block, how?
  • What is the difference between webdriver/firefoxdriver?
  • What is the difference between “get” and “navigate” to open a web page in a selenium web driver?
  • Using the selenium web driver, how can we get the font size, font color, and font type used for a particular text on a web page?
  • How do you manage the code versions in your project?
  • How do we handle dynamic elements without using XPath?
  • How to handle alerts and confirmation boxes.
  • How to handle colors in webdriver?
  • How does press shift +tab?
  • How to take a screenshot in selenium.
  • How does the selenium webdriver work?
  • How do you create an HTML test report from y our test script
  • How do you handle HTTPS websites in selenium
  • How the TestNG interact with the selenium core
  • How to change the user agent in Firefox by selenium webdriver
  • How to check all checkboxes on a page
  • How to disable cookies in a browser
  • How to get the name of the browser using webdriver?
  • How to handle the ajax popup window
  • How to handle autocomplete box in webdriver
  • How to handle network latency using selenium
  • How to know all the methods supported in webdriver and its syntax
  • How to login into any site if it shows an authentication pop-up for user name and password during the launch of the URL
  • How to mouser hover on an element.
  • How to pass parameters from testng.Xml into test cases
  • How to perform double click using webdriver
  • How to prepare customized HTML reports using TestNG in a hybrid framework
  • How to put text in any search box using selenium webdriver
  • How to refresh a page without using a context click?
  • How to run tests in multiple browser parallel (selenium grid )
  • How to store a value which is text boxes, using webdriver?
  • How to switch between the windows
  • How to type next in a new line inside a text area
  • How to work with dynamic web table
  • How to work with the radio button in webdriver
  • How can we retrieve the dynamically changing ads
  • If a selenium function requires a script argument, what would that argument look like in general terms?
  • If TestNG, I have tests test-1, test-2, test-3, test-4 and test-5. I want to run my execution order as test-5, test-4, test-3, test-2 and test-1. How do you set the execution order? Can you explain that?
  • The latest version of Firefox and selenium in the market and the version on which you are testing
  • List the browsers, os supported by the selenium
  • Please tell me the difference b/w implicit wait and explicit wait
  • Provide detail about the TestNG test output folder.
  • Suppose the developer changed the existing image to a new image with the same XPath. Is the test case pass or fail
  • There is a scenario where “assert.Assertequals()” function fails automatically; it has to take the screenshot. How can you achieve this
  • Is there a way to click the hidden links in webdriver?
  • What are the technical challenges that you faced with selenium?
  • What classes extend webdriver
  • What is an action class in webdriver?
  • What is selense?
  • What is the hierarchy of TestNG annotation
  • What is selenium? What are the different selenium components?
  • What is an XPath?
  • How to refresh a page without using a context click?
  • How to handle autocomplete box in webdriver?
  • The difference between selenium 1.0 and selenium 2.0 ??
  • How to switch between the windows (getwindowhandle and getwindowhandles)
  • How to read a particular cell from an HTML table
  • How to switch between frames in selenium webdriver
  • What are the different types of locators in selenium?
  • How to handle the ajax popup window
  • How to connect to excel code for excel(poi) API to read excel,
  • Retry executing only failed tests using TestNG
  • Relative XPath method
  • Parallel execution of test methods in TestNG
  • Parallel execution of classes in TestNG
  • Testing in multiple browsers using selenium and TestNG
  • Find out broken links on a website using selenium webdriver and HTTP client
  • Find broken/invalid images on a page
  • How to handle internationalization through webdriver?
  • Page object model | pom
  • Taking screenshots only for failed tests
  • Wait commands in webdriver
  • What is a TestNG listener?
  • How to select an element from the dropdown?
  • What is a webdriver event listener?
  • What are the benefits of using TestNG
  • What are browsers supported by selenium ide
  • What are different access specifiers in java
  • What are the different assertions or checkpoints used in your script?
  • What are the different parameters for @test annotation
  • What are the different types of driver implementation
  • What are the features of TestNG?
  • What is the operating system supported by selenium
  • What are the possible scenarios where selenium findelement get fails
  • What is the basic use of firefox profiles, and how can we use them using selenium
  • What is the default time for selenium ide and webdriver
  • What is the difference b/w getwindowhandle and getwindowhandles
  • What is the difference between get and navigate to open a web page in selenium webdriver
  • What is the difference between the @before method and @ before class?
  • What is the difference between absolute path and relative path
  • What is the difference between driver.Close() and driver.Quit()
  • What is the difference between selenium RC and webdriver
  • What is the difference between single and double slash
  • What is the difference between thread.Sleep() and seleniumsetspeed(“2000”)
  • What is the difference between thread.Sleep() and selenium.Setspeed()
  • What is the most challenging test problem in my career automation
  • What mobile devices does it support
  • What are the different methods to locate an element?
  • Which one is better, one XPath or CSS
  • Which repository have you used to store the test scripts?
  • Why do we refer firefox driver to the webdriver inheritance
  • Write a code to use assert if my user name is incorrect.
  • Write a java program for swapping two numbers.
  • Write down scenarios that we can’t automate.
  • What are the differences between selenium webdriver, ide, and RC?
  • What do desired capabilities do?
  • What is the actions class in webdriver
  • What is the difference between overload and override
  • What is the difference between webdriver and listener and TestNG listener
  • Read particular cells from the HTML table
  • The logic for looping the table, XPath to iterate rows & columns
  • Can we run a group of test cases using TestNG
  • Code for opening the Firefox browser
  • Does selenium support HTTPS protocols?
  • Downloading a file and save it?
  • Explain any 3 TestNG annotations.
  • TestNG- write sample code to select a browser depending on the parameter given in testing.Xml
  • Parameter annotation, how to add system property for chrome/iedriver.Exe for chrome & ie
  • How to check results with expected assert.Assertequals().
  • Implicit wait and explicit wait- webdriverwait or thread.Sleep()
  • What is rest API
  • Explain rest request methods (get, post, put)
  • Explain status codes like 200, 400, 404, 500, etc.
  • What is POJO class, and how to use it to rest assured?
  • How will you handle responses if they are nested JSON?
  • How to do setup for appium
  • Explain maven and pom.Xml
  • Explain log4j and how to customize it
  • Primary key vs foreign key
  • What is join
  • Drop vs truncate
  • Can we retrieve the data after a drop or truncate
  • How will provide story points for testing
  • How will you estimate automation efforts
  • How will you decide whether to automate or not
  • Defect cycle in Jira
  • What is a deferred bug
  • Bug leakage vs bug release

Conclusion:

SDET interview questions related to Selenium are designed to assess the technical expertise of candidates applying for software development and testing roles. These questions cover various topics, from basic programming concepts to advanced test automation techniques, and require candidates to demonstrate their knowledge and problem-solving skills.

By preparing thoroughly for these types of interviews, candidates can increase their chances of success and impress potential employers with their technical abilities. Ultimately, using Selenium effectively is a valuable skill in the software development and testing industry, and SDET interview questions related to Selenium play an important role in identifying top talent.

If you have gone through an SDET interview, please feel free to share your insights on the types of questions asked, your preparation strategy, and any tips you may have for other candidates. Similarly, if you have any suggestions for improving the interview process or the types of questions asked, we would love to hear them. And if you have any questions related to SDET interviews or Selenium, please don’t hesitate to ask in the comments section. We are here to support and assist you in any way we can.

I love open-source technologies and am very passionate about software development. I like to share my knowledge with others, especially on technology that's why I have given all the examples as simple as possible to understand for beginners. All the code posted on my blog is developed, compiled, and tested in my development environment. If you find any mistakes or bugs, Please drop an email to softwaretestingo.com@gmail.com, or You can join me on Linkedin.

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