Applovin Interview (面經)

職位：SDE Intern positon
地點: San Jose

1. 輪電面：self introduction
   what’s your interest
   Concept of 「Concurrent」
   Thread vs process: definition and difference
   difference between static-field and non static field
   synchronized meaning
   difference between synchronized a static method and synchronized a non-static method
   difference between lock and synchronized
   difference between read lock and write lock
   What’s the purpose of executors
   why do we need immutable class
   what’s the meaning of final
   what’s the meaning of volatile, give an example how to use it.

2. 輪電面：how to ensure date consistency in distributed system ? What's the concurrent meaning ? Tell me about one of your project ? Which part do you use in Spark ? tell me about RDD ? 下面就是算法題： 寫個transform function, 將 str 轉化爲另外格式的str

3. 輪onsite: 7道算法，三輪面
   tree level traversal
   reverse linkedlist
   Product of Array Except Self
   Group Anagrams----follow up
   LFU cache
   Design a cache to maintain data consistency between database and memory

面的結果還行，題目難度適中...可是感受一個intern，面的這麼serious, 有必要麼？ anyway, 這是一次寶貴的經歷，到San Jose 免費溜了一圈， 感覺了下老美找工做的流程 。。。。但願個人面經能給你們帶來幫助哈