SDET Interview Questions and Answers
Ques 1. What is the difference between unit testing and integration testing?
Unit testing focuses on testing individual components in isolation, while integration testing checks interactions between components.
Example:
Unit test: Testing a single function. Integration test: Testing the communication between two modules.
Ques 2. Explain the concept of Test Automation Pyramid.
The Test Automation Pyramid emphasizes having a larger number of unit tests at the base and progressively fewer tests at higher levels such as integration and UI tests.
Example:
Base (bottom): Unit tests, Middle: Integration tests, Top: UI tests
Ques 3. What is the importance of code reviews in test automation?
Code reviews help ensure code quality, maintainability, and adherence to coding standards, ultimately leading to more robust and reliable test automation scripts.
Example:
Regular peer reviews of test automation code before merging into the main repository.
Ques 4. How do you handle dynamic data in automated tests?
Use parameterization or data-driven testing techniques to handle dynamic data. This allows tests to run with different input values without modifying the test script.
Example:
Parameterizing a login test with different usernames and passwords.
Ques 5. Explain the concept of Page Object Model (POM) in Selenium testing.
Page Object Model is a design pattern that represents web pages as objects, making the automation code more modular and maintainable by encapsulating the interaction with the page elements.
Example:
Creating a separate class for each web page containing methods to interact with elements on that page.
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