Can you explain the differences between an abstract class and an interface in object-oriented programming? How would you optimize a database query that is running slowly due to a large dataset? Walk us through the process of implementing a binary search algorithm. Describe a challenging bug you've encountered in your previous projects and how you debugged and resolved it. What is the significance of RESTful APIs in web development, and how would you design one? How do you ensure the security of user data when developing a web application? Can you explain the principles of object-oriented design and how they contribute to creating maintainable software? Share an example of a project where you collaborated with a cross-functional team to deliver a successful outcome. How would you handle a situation where a project deadline is approaching, but you discover a critical flaw in your code? Explain the concept of version control, and discuss the advantages of using Git in a software development workflow. Describe the SOLID principles and how they influence your approach to writing clean and extensible code. Give an overview of the Agile development methodology and how you've applied it in your previous roles. How do you stay updated with the latest trends and technologies in the software engineering field? Discuss a project where you had to make a trade-off between implementing a feature quickly and ensuring code quality. Can you provide an example of a situation where you had to refactor a piece of code to improve its performance?