SQL for Java Devs – Page 11 – Sharp: NCLEX, Java & Python

Java: PreparedStatements

Why does a placeholder in a PreparedStatement matter in this design?

What are the trade-offs of using complex SQL JOINs in large datasets?

How do SQL JOINs affect the shape of the result set compared to separate queries?

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?