Today have the third interview with Costin from amazon. It's a mess as the sound in speakerphone is vague so I can hardly hear what he said. Anyway, he asked me totally just two questions, and one of them is can you introduce polymophism? and what's the other two important concept in OO?
And the other is sum up all the prime numbers from 1 to 100.
Now i'm beginning to read probabilistic latent semantic analysis(PLSA). I think this is an old but useful topic model. So it is worth to implement when doing news recommendation. Also, I asked Nannan to read the Recommendation Algorithm based on LDA Model. Finally we separated the work.
btw, the new headset is wonderful!! I'm not tired with it at all!! Sennheiser HD202, cheap and wonderful sound :D
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