AI-powered Full Stack Developer mock interviews

Explain the concept of closures in JavaScript and provide an example of how you have utilized closures in your previous projects.

Discuss the differences between 'let', 'const', and 'var' in JavaScript in terms of scope, hoisting, and reassignment. Provide a scenario where you would choose one over the other.

Can you explain the concept of lazy loading in web development and provide an example of how you have implemented it in a project?

How do you approach optimizing web performance for a large-scale application, specifically focusing on reducing render-blocking resources and improving time to interactive metrics?

Discuss the importance of caching in a web application and how you would implement caching strategies to optimize the performance of a RESTful API.

Explain the concept of database indexing and how it can improve the performance of queries in a relational database system.

Can you explain the differences between INNER JOIN, LEFT JOIN, and RIGHT JOIN in SQL and provide a scenario where you would use each type of join?

How would you optimize a slow-performing SQL query that involves multiple joins and aggregations? Please provide at least two strategies you would consider for query optimization.

Describe a situation where you had to communicate a complex idea to a non-technical stakeholder. How did you ensure effective communication and understanding? What strategies did you use to overcome any potential misunderstandings?

Can you provide an example of a time when you had to navigate a challenging team dynamic to successfully deliver a project? How did you approach the situation and what was the outcome?