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刚面完亚麻Data eng,尽力回忆一下题目
面试官印度人,口音较重,楼主英语渣渣好多让他重复,但还是没听懂
一上来面试官自我介绍,没有楼主自我介绍和BQ环节,直接开始问专业问题
主要三方面: experiences, SQL, python
问题:
1. What are you interested in Data Eng position? What are your relevant experiences? 然后根据你的回答有follow up questions
2. what is normalization? when do you use it?
3. what is denormalization? when do you use it?
3. What is the difference between normalization and denormalization?
4. What is factless fact table?
5. 还有问realtime database (such as bank transaction records)跟普通database的区别?这题没太明白
live code环节:
1. 填空
table a:
---
id
---
1
1
1
1
1
---
table b:
---
id
---
1
1
---
问题:
1). select count(*) from a LE
--------+-----------+------------
date | customer_id | change
--------+-----------+------------
02-01-2020 | 1 | free -> paid
05-01-2020 | 1 | free -> paid
05-20-2020 | 2 | free -> paid
-----------------------------------
能回忆清楚是这些,不一定一字不差,大概是这个意思
没听清楚的问题: what is well db? 这题不确定发音,毕竟不知道well db是什么
尽力回忆啦,求大米~~~
祝大家都能找到心仪的工作!
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