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Top 20 Frequently Asked Regression Testing Interview Questions & Answers

Regressing Testing is performed to check that modified code should not break the application functionality. It can be done either manually or automatically. This is a functional testing technique that has to go under various phases that need to be considered carefully while testing. In this blog, we will discuss the popular regressing testing interview questions and answers that are necessary to learn by quality experts when they are preparing for the interview.

Regressing Testing Interview Questions

Regression Testing Interview Questions and Answers

These questions are frequently asked by the interviewers and answers for each of them are prepared after a careful research only. Once you go through all these questions answer for fresher and experienced both, it will increase the overall chances of passing the interview and help you in grabbing your dream job.

Regressing Testing Interview Questions and Answers for Fresher

Q1). What is Functional testing?

This is black box testing where the performance of an application is checked by giving certain inputs and generate the desired outputs. The objective of functional testing is validating the behavior of the application based on documents specifications and it also checks either application is ready to release in a specific environment or not.

Q2). What are the most popular techniques of the Functional Testing?

Few popular functional testing techniques are –

Unit Testing, Smoke Testing, Regressing Testing, usability testing, integration testing, system testing, user acceptance testing etc.

Q3). What is Regression Testing?

This is a simple process of repeating test cases that is performed every time you modify the application functionality. It may be your code, design, or any other things related to the framework. The regression testing makes sure that changes will not impact or break the application functionality. So, every time new version of an app is created, the bugs are fixed automatically.

Q4). Is Regression testing done either manually or automated?

Well, the best part is that it can be done in both ways either manually or automatically. You just have to check which technique suits your project requirements the most.

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Q5). How to perform the Regression testing?

You are established with regression testing means repeating a set of test cases at any particular situation. When the app is small, regression testing can be performed manually. As the time moves on, the application starts getting more complicated and you need testing tools to speed up the process. In this case, regression testing is automated based on document specification.

Q6). What are the steps involved while performing the regression testing?

Every time changes are committed to an application or software program; the following steps need to perform to carry out the regression testing. These are –

  • Firstly, you need to check what type of changes are made to the application,
  • Now you have to check how it may affect the application behavior.
  • Take a closer look at the test case and determine either you need to perform a full, partial or unit testing. Don’t forget to check which testing suits your requirements the most.
  • Set the time and go away! All the best!

Q7). Why is Regression testing beneficial for IT industries?

Every time when a programmer adds the new code to fix the previous bug, several new bugs are introduced simultaneously. The objective of Regression Testing is to check where the new code complies with the older ones. The application behavior should be as per expectation otherwise changes are discarded immediately.  For this purpose, this is necessary that testing should be completed on time before the product is released onto the market. This is a continuous process and should be taken as the routine activity during application development.

Read: List of Top 12 Software Performance Testing Tools to Help You The Most!

Q8). Regression Testing is needed to what extent?

Well, it depends on application nature and scope of changes. If the scope is large then testing needs to perform thoroughly and it will take time. The complete information can be obtained from the developer about the scope, nature of applications, the total amount of change.

Q9). What are the most common types of Regression tests?

As this a repetitive tests process, a set of test cases can be used again for a new build. Keep in mind that selection of test cases should be done carefully and a number of counts also needs to be minimum. They should be improved continuously to meet the expectations of the new app.

If the scope of changes is large the continuous improvement may be difficult and needs extra efforts by testers. For this purpose, selective test cases will be used to save the overall time and money. These test cases are selected on the basis where it affects the most.

Q10). What is the best time to perform the Regression Testing?

Mostly, the regression testing is carried out throughout the development process and this is a continuous process too. Still, the best time to perform regression testing is after smoke testing or at the end of function testing after a short release.

Regression Testing Interview Questions for Experienced

Q11). How can you perform the regression testing effectively? Explain based on your previous work experiences?

To perform the regression testing effectively, you need to create the test plans. The plan will include the testing strategy and the exit criteria. Performance testing is also done later to make sure that changes will not affect the performance of system components.

Q12). What are the best practices you followed to perform the Regression Testing successfully?

Here, are some of the best practices listed below based on my experience to perform the regression testing successfully without any failure.

  • The test cases should run automatically daily in the evening when changes are made to the application.
  • In this way, bugs can be identified at an early stage and it will be fixed immediately.
  • It will also reduce the risks associated with the release by covering all the defects earliest at the end of the release cycle.

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Q13). Why do we need the Regression testing tools?

Regression tools are vital to automate the testing process. When we are loaded with a plenty of test cases whose manual execution is impossible and time – consuming too. Here, we need regression testing tools where test cases can be executed automatically and it saves your precious time too. To which level, you wanted to automate the testing process depends on a number of test cases remaining to execute.

Q14). Have you used any regression testing tool during any project?

Yes, I have worked on selenium testing tool during my past work experiences. This is a popular automation tool where test scripts are automated as the convenience.

Q15). Do Regression testing of GUI application is possible?

Well, testing of GUI applications is tough when changes are made to the interface. Still, this is possible to write the effective test cases that need continuous improvements every time the GUI is changed. The process is a little difficult so the best idea is utilizing a number of testing tools to make the process easier.

Q16). What are the strategies to follow while conducting regression testing?

Well, there are two popular strategies that you should follow –

  • Either you may run all the test cases,
  • Or you need to select a set of test cases based on the nature and scope of the changes.

Q17). When will QA team perform Regression Testing?

Regression testing is performed when a new build comes to the QA team and it is prone to bugs. Here, quality testers need to remove the bugs during each release cycle and make sure that application is still working fine as earlier.

Read: What Is The Learning Path Of A Penetration Tester?

Q18). Can you explain the concept of Regression Testing with the help of Example?

Yes, I will explain to you the concept of regression testing with a simple example and easy to understand for everyone. Take an example of a project having multiple modules like Admin module, employee module, personal details modules etc. there is some error in admin module like users are not able to login to their account even with the right credentials. So, this is an error and need to be fixed by the development team. Here, Development team modified existing code or added new code to fix this issue and the module is sent back to the testing team again.

Now the testing team will check either modified code has not affected the behavior of the rest of the application or it is giving output as per expectations only or still needs changes. This is called the Regression testing where new code should never affect the functionality of application during bug fixing. I hope you better understand the concept now why Regression testing is necessary and how is it performed.

Q19). What are the important facts to focus on while writing Regression test cases?

Writing a test case is the most important step while performing test execution process and in-depth knowledge can always make the testing process easier and quicker.

  • To write the test cases, you should have a clear understanding of the client requirements.
  • Each requirement should be presented in the form of test cases and make sure nothing important details are left out.
  • Based on the document specifications, remember that functional and non-functional requirements are represented well.
  • Test cases should be reviewed from time to time and make sure that they are not repeated.
  • As soon as changes are made to the application, design new test cases if old ones are not valid.
  • The structure of a test case should be kept simpler so that it can be validated for a wider range and understood by everyone.

Q20). What is the difference between regression testing the retesting?

Re-testing is a special technique needed to check the test cases that not successful in the final execution and passed directly after the defects the repaired.

At the same time, Regressing testing is used to check the code either changes don’t have any adverse effect on the app functionality.

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Final Words:

Through this article, we tried to cover each possible aspect of Regression testing and why is it necessary for your application releases. The person who is preparing for the testing interview should go through this interview questions guide thoroughly to get an in-depth learning of the concept.

We make sure that this guide will surely help you in clearing your interview with the full confidence and get your dream job right away. Also, you are recommended to join QA certification program at JanBask Training to get hands-on expertise on different testing concepts or techniques.

Happy learning and job hunting with JanBask Training!


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