DBA interviews
- From: "ryan gaffuri" <ryan.gaffuri@xxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 20 Aug 2004 17:45:59 -0400
Another thread got me to think that this might be a good topic. What types
of questions do you ask for a senior level position? Most interviews I have
had have been really easy. I had one that was 3.5 hours, but it was just
hours of the same stuff... not real hard. Most of the 'tricky' stuff are
picky little syntax things that I think are silly. I have seen some
interviews posted on the web where they ask tremendous numbers of really
detailed questions on all sorts of topics.
The three questions I always ask no matter what are the following:
1. Select, from,where, group by, having, order by: What order are these
processed in? Then I go into the implications. I'm basically looking to see
if the person understands the set based nature of SQL.
2. The following is a really tricky counter-intuitive SQL question, that I
have never seen in practice(got it out of an academic textbook. Its really
simple to do in relational algebra) Don't them use Oracle either. I want
them to do it on a white board(mainly for intimidation, I want to get rid of
people who give up real quick). I don't expect people to get it most of the
time. I just want to see how hard you try. Most people won't even give it a
good try. There are two solutions.
You have 3 tables. Saliors, BoatsXSailors, Boats. This is a many to many
relationship. Assume the keys are Sailor_id, salXBoat_id, Boat_id. Find all
the sailors that have used all the boats.
I ask other stuff depending on what I am looking for, but I always like to
ask those.
3. Got this one off asktom. Draw me a picture of the Oracle database
including all background process, memory structures, and file systems. Then
I ask about interactions. I don't want it memorized, but I want big picture
knowledge about redo, undo, etc...
I ask other stuff depending on what I am looking for. What do you ask? What
traits are you looking for? I'm sure some of you have really hard
interviews...
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