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The Wrong Answers

Posted by evanx on October 30, 2006 at 4:04 PM EST
Frank Somerville posted "My Favorite Java Developer interview questions" which i enjoyed reading a minute ago. Here are some answers to avoid ;)


Q. When does the JVM do Garbage Collection?
I got no idea. Who's JVM, is he the janitor here?

Q. What's the difference between an interface and an abstract class?
An abstract class is um, a class that is abstract. An interface is just an interface.

Q. Name the different types of JDBC drivers?
MySQL, PostgreSQL, SQLServer... You want all of them?!

Q. How do I find out how many rows there are in a ResultSet?
Easy. resultSet.length(). No hang on, actually it might be resultSet.length.

Q. Does Java use pass-by-value or pass-by-reference semantics?
For what, an int or a String?

Q. What does "NULL" mean in SQL?
Ok, this must be a trick question. If it's not null, um... zero!?

Pick one and answer it, correctly or incorrectly :) Any other good questions?

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