One challenging bug I encountered was a memory leak in a web application. The application would crash after prolonged use. I used Chrome DevTools to monitor memory usage and identified a specific function that was causing the leak. I then collaborated with the development team to refactor the code, ensuring proper garbage collection. This resolved the issue and improved the application's performance.

When working on a tight deadline, I prioritize tasks based on risk assessment. I focus on testing critical functionalities first, such as user authentication and payment processing, as these are crucial for the application's core functionality. I also ensure to test any recent changes or bug fixes to prevent regressions. By using a risk-based approach, I can deliver high-quality results within the given timeframe.

For test automation, I commonly use tools like Selenium for web applications and Appium for mobile apps. I follow the Page Object Model (POM) to organize test scripts and maintain them easily. Additionally, I use Jenkins for continuous integration to automate test execution and reporting. This setup ensures efficient and scalable test automation, reducing manual effort and improving test coverage.

Effective communication is key when reporting bugs. I provide clear and concise bug reports, including steps to reproduce, expected and actual results, and any relevant logs or screenshots. I also prioritize the severity and impact of the bug. When discussing with developers, I remain open to feedback and collaborate to understand the root cause. This approach fosters a cooperative environment and helps in resolving issues more efficiently.

I have extensive experience with cross-browser and cross-platform testing. I use tools like BrowserStack and Sauce Labs to test applications across different browsers and operating systems. I create detailed test matrices to ensure comprehensive coverage. Additionally, I automate cross-browser tests using frameworks like Selenium Grid. This approach ensures that the application performs consistently across various environments, enhancing user experience.