Commonly asked questions in an automation testing interview

Following are some of the commonly asked question in automation testing interview:

1. What is automation testing and why is it important?
   Answer: Automation testing is the process of using specialized software to execute pre-scripted tests on a software application or system. It is important because it allows for the efficient and thorough testing of software, and can save time and money in the long run.
2. What are the different types of automation testing?
   Answer: The different types of automation testing include: unit testing, integration testing, system testing, and acceptance testing.
3. What are the benefits of using automation testing?
   Answer: The benefits of automation testing include: improved accuracy, increased test coverage, faster execution of tests, and reduced costs.
4. What are the limitations of automation testing?
   Answer: The limitations of automation testing include: initial setup costs, the need for specialized expertise, and the fact that automated tests can only test what has been programmed.
5. What are the most popular automation testing tools?
   Answer: Some of the most popular automation testing tools include Selenium, Appium, TestComplete, and UFT.
6. What is a test case and how do you write one?
   Answer: A test case is a set of conditions or variables under which a tester will determine whether a system under test satisfies requirements or works correctly. To write a test case, you need to identify the requirements and then determine the steps and expected results to test those requirements.
7. What are the different types of testing?
   Answer: Different types of testing include: functional testing, non-functional testing, unit testing, integration testing, system testing, acceptance testing, load testing, performance testing, security testing, and regression testing.
8. What is Selenium and what are its advantages?
   Answer: Selenium is an open-source automation testing tool that is widely used for web application testing. Its advantages include: it is free, cross-platform and supports multiple languages, it has a large and active user community, and it can be integrated with other tools for test management and continuous integration.
9. What is TestNG?
   Answer: TestNG is a testing framework for the Java programming language. It is similar to JUnit but has some additional features, such as support for data-driven testing and the ability to run tests in parallel.
10. How do you handle dynamic elements in automation testing?
    Answer: Dynamic elements can be handled in automation testing using techniques such as using dynamic locators, creating custom wait conditions, and using regular expressions to match patterns in the element's attributes.

It is important to note that depending on the company’s needs and the position you are applying for, the questions can vary. Also, the answers provided here are a brief explanation, to give you an idea of what to expect, so it’s always good to have a deeper understanding of the topic.