Webdriver + servlets, do they add up?

Question

I was recently interviewed for a job as a developer in test, and the interviewer asked me if I had any previous experience with servlets. This questions was totally odd because they don't use servlets at all, and I can't see how webdriver is used together with servlets. When is servlets necessary for webdriver? To build APIs or what?

Answer 1

Servlets are not required to use Selenium WebDriver. They solve different problems:

1. WebDriver automates a browser and interacts with a web application like a user.
2. Servlets are Java server-side components that receive HTTP requests and generate responses.

The interviewer may have asked because the application under test is a Java web application—even if the current team does not directly write servlets. Understanding servlets helps a developer in test understand request/response handling, sessions, cookies, authentication, redirects, and backend failures.

Servlet knowledge could also be useful when building:

1. Test-support endpoints or mock services
2. APIs for test setup and data cleanup
3. Internal test dashboards
4. Server-side integration tests
5. Tools that trigger Selenium tests remotely

However, modern Java applications often use frameworks such as Spring Boot that hide most direct servlet code. So the likely purpose of the question was to evaluate your understanding of Java web architecture, not because WebDriver specifically requires servlets. Selenium WebDriver documentation⁠ and Jakarta Servlet specification⁠.