>I've seen shops where they asked you about OOP/OOAD but their apps have yet to be upgraded from spaghetti stuff. I remember seeing asp pages that had over 3000 (three thousand) lines. There were no procedures defined in these particular pages.
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>So it would be fair to see their code too when interviewing.

No one has ever asked me to look at our code when interviewing. I think I would have been shocked if someone did asked. We always do two interviews with developers and I think if they made it to the 2nd interview I wouldn't have a problem with showing them the code if they wanted to see it.