Oren Eini

aka Ayende Rahien

Oren Eini

CEO of RavenDB

a NoSQL Open Source Document Database

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oren@ravendb.net

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RavenDB Workshops - Deep dive into practical use of Document Data Modeling

Dec 10 2006

Interview Questions From Hell: Take IV

time to read 2 min | 340 words

It somehow came up in chat today, and it occurs to me that this is yet another great question that I probably will never ask in an interview:

Tell me how System.Object.GetHashCode() works, here is a computer with net connection, google away.

Personally, it took me 11 minutes to find how the implementation worked, and another seven to find it.

Possible reactions:

Candidate faints -> Good timing, would've waste my time staying up and talking
Cadidate explains that he doesn't care about such things -> and if he can convince me that he doesn't care for the right reasons, excellent.
Canidate hazzard a guess that is not even remotedly close to the truth, like serializing the object to binary and hashing that -> interesting approach, remind me to send a perf team to your next employer :-)
Candidate explains that they don't know, but give a reasonable alternative for it -> nice
Candidate goes and find the implementation -> good, now explain it to me :-)
Candidate gives the answer of the top of their head -> dude, if you weren't on the BCL team, you are wierd

Hm, I wasn't on the BCL team, so this make me wierd... Maybe I should rethink this approach

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RECENT COMMENTS

Dmitry, Yes, but this is _known_ to be a 64 bits system - since we are allocating 3GB (not possible in 64 bits). Note t...

By Oren Eini on Answer: What does this code do?
That's why it is a good idea to compare the return value of `write` to the buffer size. "size_t" can be 32-bit on some system...

By Dmitry on Answer: What does this code do?
There's a reason we miss `write_exact` and `read_exact` from the standard library. In fact, I am surprised the chunk is actua...

By Pyth0n on Challenge: What does this code do?
kpvleeuwen, I agree, unfortunately I don't have anyone to ask off the top of my head. Thanks, I fixed the headers.

By Oren Eini on Performance discovery: IOPS vs. IOPS
It could be interesting to reach out to storage firmware developers and ask what write patterns they think would be useful ex...

By kpvleeuwen on Performance discovery: IOPS vs. IOPS

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