How many types of JDBC drivers in Java is a classical JDBC interview question, though I have not seen this question recently it was very popular during the last decade and still asked mostly on Junior programmer level interviews. There are mainly 4 types of JDBC drivers in Java, those are referred to as type 1 to type 4 jdbc drivers. I agree it's easy to remember them by type rather than with their actual name, Which I have yet to get in-memory except for plain old JDBC-ODBC bridge driver.