David Yen

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since Feb 23, 2005
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Recent posts by David Yen

It all depends. Difficulty of the problem, background of the candidates, nature and function of the position open, just to name a few. In general, a complete solution would be ideal. Otherwise, I wish to see some flexibility and creativity in his approach to the problem. And, usually, I ask much more than one question. That's as much as I can tell. Can't let out too much of my secret sauce...
16 years ago
David Harkness and Srinivasa Raghavan, I strongly believe that you are reading it correctly. I was the one who gave Xie this problem.

This problem will be deprecated from my problem library, as I realize that there are so many resources online on this topic today, compared to what was available two years ago. It was a very interesting problem.

The ability to figure out good keywords is indeed and still an art. We need to turn it into science one day.
[ February 24, 2005: Message edited by: David Yen ]
16 years ago
When interviewees are permitted to go home, ask anybody any question, search on the Internet for answers, read any books they want; questions are supposed to be real-life problems. Interviewees may not find out the optimal solution; but if they show they know how to approach a problem when they get stuck, they are considered to be fairly good candidates. I believe it is more realistic to evaluate candidates by giving them all freedom they want and all resources available. Besides, I like creative interviews.

There are plenty of resources online on this topic. One good article is http://www.dbazine.com/tropashko4.shtml, which you may obtain by using "trees in sql" as search words.

Just to add that the hint was misunderstood. Perhaps I had not been too clear during the interview.

Just took the comma out from the URL... Thanks, Ernest.

[ EJFH: Fixed URL ]

[ February 23, 2005: Message edited by: David Yen ]

[ February 23, 2005: Message edited by: Ernest Friedman-Hill ]
[ February 23, 2005: Message edited by: David Yen ]
16 years ago