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summer intern phone interview with A9

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kobe24 发表于 2015-12-7 01:16:29 | 显示全部楼层 |阅读模式

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phone interview with their search/machine learning/recommender system team. Interview around 1 hour and interviewer is from Korean.. 1point 3acres 璁哄潧

coding: there are K files with time stamped log information, how to merge them into one big file based on time sequence order.  The question is similar to merge K sorted list but should handle how to read 10 files at the same time.. 涓浜-涓夊垎-鍦帮紝鐙鍙戝竷

design: write a pseudo code to design a recommendation system engine. I use matrix factorization based model with stochastic gradient descent optimization for parameter learning.

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