Q: Can you describe your experience with both .NET Framework and .NET Core? How do you decide which one to use for a given project?
A: I have over 10 years of experience working with both .NET Framework and .NET Core. My decision to use one over the other typically depends on the project requirements. For legacy applications or when working on Windows-specific technologies, I prefer .NET Framework. However, for new projects, especially those that require cross-platform capabilities, microservices, or containerization, I opt for .NET Core due to its lightweight nature, performance, and enhanced support for modern development practices.
Q: Discuss a challenging debugging experience you faced in a full stack application and how you resolved it.
A: In a previous project, I encountered a significant performance issue in a full stack application. The front-end was slow to load due to inefficiencies in the back-end API calls. I used profiling tools to identify the bottleneck, which was a poorly optimized database query. By rewriting the SQL query and implementing caching at the API level, we reduced load times by over 50%. This experience highlighted the importance of thorough testing and performance monitoring.
Q: What best practices do you follow for ensuring secure coding in .NET applications?
A: To ensure secure coding in .NET applications, I follow several best practices: first, I validate all user inputs to prevent injection attacks. I also use parameterized queries and entity frameworks to interact with databases, which helps mitigate risks. Additionally, I implement logging to detect unauthorized access attempts and regularly review and update libraries to patch known vulnerabilities. Lastly, I adhere to the principle of least privilege, ensuring users only have access rights necessary for their roles.
Q: How have you applied Agile methodology and DevOps practices in your past projects? Can you provide a specific example?
A: In my last role, I worked in an Agile environment where we utilized Scrum methodology. We held weekly sprints and daily stand-ups to track progress. Additionally, I implemented CI/CD pipelines using Azure DevOps, allowing for automated testing and deployment. For example, during the development of a microservices architecture, we set up a pipeline that ran unit tests and deployed to staging environments automatically whenever new code was pushed. This significantly improved our deployment frequency and reduced the number of production issues.
Q: Can you explain your experience with Docker and Kubernetes in developing and deploying microservices?
A: I have deployed several microservices using Docker and Kubernetes. Docker allows me to containerize applications, ensuring consistency across development and production environments. I use Docker Compose for local development to simulate multi-container applications. With Kubernetes, I've managed deployment, scaling, and monitoring of containerized applications in a cloud environment. For instance, I set up a Kubernetes cluster that handled auto-scaling of services based on CPU usage metrics, which helped ensure availability and performance during peak loads.