SQL for Java Devs – Page 3 – Sharp: NCLEX, Java & Python

Java: Transactions

What role does commit() play in a JDBC transaction?

How can rollback() be used effectively in JDBC?

How would you explain a database transaction in JDBC in an interview?

When should you use PreparedStatement over Statement in JDBC?

What are isolation levels in JDBC and why are they important?

What happens when auto-commit mode is enabled in JDBC?

How can you ensure a ResultSet is closed even if an exception occurs?

What makes PreparedStatement safer than Statement?

What are the implications of using ResultSet.TYPE_SCROLL_INSENSITIVE?

How to extract a double value from a ResultSet?