The SDLC is a process used for planning, creating, testing, and deploying an information system. Common models include Waterfall, Agile, and DevOps. I prefer Agile because it allows for iterative development and continuous feedback, which leads to better end products and more flexibility in addressing changes.

I ensure the quality of my code through several methods: writing unit tests to cover edge cases, conducting regular code reviews with peers, using static code analysis tools, and following best practices and coding standards. Additionally, I prioritize writing clean, maintainable, and well-documented code.

In a recent project, I faced an issue with the application's performance due to inefficient database queries. After profiling the code, I identified the bottleneck, optimized the queries, and introduced indexes to improve response times. I also refactored the code to reduce redundant processing, which significantly enhanced overall performance.

I have extensive experience with Java, Python, and JavaScript. Additionally, I'm proficient in frameworks like Spring Boot for Java, Django for Python, and React for JavaScript. I also have hands-on experience with version control systems like Git, continuous integration tools like Jenkins, and cloud platforms like AWS.

I approach debugging systematically by first trying to reproduce the issue. Once replicated, I use logging and debugging tools to trace the problem, analyze stack traces, and inspect variable values. By narrowing down the potential causes, I isolate the issue and identify the root cause. Finally, I implement and test the fix, ensuring it resolves the issue without introducing new bugs.

I stay updated by following technology blogs, participating in online forums, and attending webinars and conferences. I also take online courses and read books to deepen my knowledge. Additionally, I collaborate and share knowledge with peers in the developer community to stay abreast of the latest trends and best practices.