You are probably more easily taught how to write good programs because a) your understanding of the basics is solid; b) let's face it, these brain teasers are

You are probably more easily taught how to write good programs because a) your understanding of the basics is solid; b) let's face it, these brain teasers are often proxies for intelligence testing. If they have a glut of candidates for every position, whiteboarding data structures and algorithms makes for a decent filter.