Often, The objective if Interview is bascially "not to select good DBA" but to select a person who can easily fit in the requirement and often the inerview's question are very much limited and predictable.
and this is also a reason why people instead of picking the stuff for learning perspective, they choose to grab perdictable easily catching hen.
Very few people read the article/"join forums" to learn or excel their skills.
-------Bhuvnesh----------
I work only to learn Sql Server...though my company pays me for getting their stuff done;-)