SQL for Java Devs – Page 12 – Sharp: NCLEX, Java & Python

Java: JDBC

How would you explain a common pitfall when using raw JDBC in high-traffic applications in an interview?

How would you explain an SQL JOIN, and why is it essential in relational databases in an interview?

How does an INNER JOIN work in SQL?

Why can using JOINs help prevent the N+1 query problem?

How would you explain a LEFT JOIN, and when should you use it in an interview?

How do JOIN operations affect the shape of the result set?

What are some trade-offs when using complex SQL JOINs in large datasets?

How would you map a one-to-many relationship in Java using JDBC?

What are the design consequences of using JOINs in application logic?

What are the trade-offs of using raw JDBC over ORM frameworks?