20 Regression Testing Interview Questions and Answers

Regression testing is a type of software testing that is used to verify that changes to a software system do not introduce new bugs. This type of testing is important for ensuring the quality of software systems, and as such, employers often look for candidates with experience in regression testing. If you are interviewing for a position that involves regression testing, you can expect to be asked questions about your experience and knowledge. In this article, we will review some common regression testing interview questions and how you should answer them.

Regression Testing Interview Questions and Answers

Here are 20 commonly asked Regression Testing interview questions and answers to prepare you for your interview:

1. What is regression testing?

Regression testing is a type of testing that is used to verify that a software program continues to function correctly after it has been modified or updated. This type of testing is important because it helps to ensure that changes to the program do not introduce new bugs or cause existing features to stop working correctly.

2. Can you explain the purpose of regression testing?

Regression testing is a type of testing that is used to verify that changes to a software program do not introduce new bugs or cause existing bugs to reappear. This is important because even a small change to a software program can potentially introduce new bugs or cause existing bugs to reappear. Regression testing helps to ensure that changes to a software program do not introduce new bugs or cause existing bugs to reappear.

3. What are some common regression test scenarios?

Some common regression test scenarios include:

-Testing functionality that was recently added or changed
-Testing functionality that is known to be buggy
-Testing functionality that is critical to the application
-Testing functionality that is frequently used
-Testing functionality that is likely to be affected by other changes

4. Why do we need to perform regression testing after every change in code?

Regression testing is important because it allows us to verify that changes to the code have not introduced any new bugs. By running the same tests that we have run in the past, we can be confident that the code is still behaving as expected. If any new bugs are found, then we can fix them before they cause any problems for users.

5. How does regression testing differ from retesting?

Retesting is the process of testing a piece of software or functionality that has already been tested. This is usually done in response to a bug being found or a change being made to the code. Regression testing, on the other hand, is the process of testing the entire software application to ensure that no new bugs have been introduced with the latest changes.

6. How can you determine which tests should be part of a regression test suite?

A regression test suite should ideally cover all functionality in the software under test. In practice, this is often not possible, so prioritization is necessary. One way to prioritize is to focus on features that are most important to the business, or that have the most potential to break if changed. Another approach is to prioritize tests that exercise code that is most likely to change, such as code that is recently added or modified.

7. Is it possible to automate regression testing? If yes, then how?

Yes, it is possible to automate regression testing. This can be done using a tool like Selenium, which can automate the process of testing web applications.

8. What do you understand about automated regression testing using Selenium WebDriver?

Automated regression testing using Selenium WebDriver is a process of using a software application to test a web application automatically. This is done by first creating test scripts that will simulate user actions on the web application under test. Once the test scripts are created, they can be executed automatically by the Selenium WebDriver software. This can save a lot of time and effort compared to manual regression testing.

9. What’s the difference between manual and automation-based regression testing?

The main difference between manual and automation-based regression testing is that, with automation, you can run tests much more quickly and easily than with manual testing. Automation also allows you to cover a larger range of test cases in the same amount of time, which can be helpful in finding more bugs. However, manual testing can be more thorough, and it can be easier to catch certain types of bugs that might be missed by automation.

10. Which one do you think is better: Automated or Manual Regression Testing?

There are pros and cons to both automated and manual regression testing. Automated regression testing can be faster and more efficient, but it can also be more expensive to set up. Manual regression testing is more labour-intensive, but it can be more flexible and allow for more human oversight. Ultimately, the best approach depends on the specific needs of the project.

11. Can you give me an example of a good use case for regression testing?

A good use case for regression testing would be to test a software application that has undergone changes to ensure that the changes have not introduced new bugs or regressions. This type of testing is especially important when changes are made to critical parts of the codebase, or when the application is being updated to a new version.

12. Do you think that exploratory testing is better than scripted regression testing? If yes, why?

I think that exploratory testing can be more effective than scripted regression testing in some cases, because it allows the tester to be more flexible and adapt to the changing needs of the software. With scripted regression testing, the tester is more limited in what they can do, and they may miss important issues that could be found with a more flexible approach.

13. How can you ensure that old bugs don’t resurface when performing regression testing?

By definition, regression testing is the process of testing a previously tested program to ensure that bugs have not resurfaced. To do this, you will need to retest the entire program, or at least those parts of the program that may be affected by the changes that have been made. This process can be time-consuming, but it is necessary to ensure that the program is still functioning correctly.

14. What do you know about “regression analysis”?

Regression analysis is a statistical technique used to predict the future behavior of a dependent variable, based on the behavior of one or more independent variables. In the context of regression testing, regression analysis can be used to predict the likelihood of a bug being reintroduced into a software system, based on the number of times the system has been tested and the number of bugs that have been found in previous tests.

15. What is your opinion on creating separate test suites for smoke testing and regression testing?

I believe that it is important to have separate test suites for smoke testing and regression testing. Smoke testing should be used to quickly identify any major issues with a new build, and regression testing should be used to verify that any changes made to the code have not introduced new bugs. Having separate test suites helps to ensure that the smoke testing is not delayed by regression testing, and vice versa.

16. Which types of testing do you think usually require regression testing?

Regression testing is often used for functional testing, system testing, and acceptance testing. This is because regression testing is used to ensure that changes to the code have not introduced new bugs or regressions.

17. What do you understand by “Regression Test Selection”?

Regression test selection is the process of choosing which tests to run in order to verify that a code change has not introduced any new bugs. This can be done manually or using a tool that automatically selects tests based on code coverage.

18. What are the advantages and disadvantages of selective regression testing?

Selective regression testing is a technique where the tester only runs a subset of the regression tests, based on the changes that have been made to the code. The advantage of this approach is that it can save time, since you are not running all of the tests every time. The disadvantage is that it can be easy to miss something if you are not running all of the tests.

19. How can you decide when to stop performing regression testing?

There are a few different ways to decide when to stop performing regression testing. One way is to simply set a limit on the number of tests that can be run. Another way is to track the number of bugs that are found during regression testing and stop when the number of bugs found starts to decrease. Finally, you can also stop regression testing when the software reaches a certain level of stability.

20. What factors affect the cost of performing regression testing?

The cost of regression testing can be affected by a number of factors, including the size and complexity of the codebase, the frequency of code changes, the number of test cases, and the resources available. In general, regression testing can be a costly endeavor, but it is often necessary in order to ensure the quality of a software product.