Do you have any knowledge/experience with scala/functional programming? Do you have any knowledge/experience with open source big-data tech like spark/hadoop/kafka? Given a network diagram, can you make any inferences based on the labeled nodes/edges/network as whole?
How do you assess the runtime complexity of this code?
What dashboarding tool should we use?
Structure of a Data Warehouse, the difference between OLAP and OLTP
What kinds of skills you learned in Statics for modeling?
Algo questions in python, then SQL and Spark.
SQL table columns: app_id install_ts media country user_id app_id install_ts media country user_id wolt 2020-01-01 00:01:00 facebook israel aaa wolt 2020-01-01 00:01:00 google israel bbb ebay 2020-01-01 00:01:00 organic usa jjj ... ... ... ... … given the above calculate the distribution the number of mediaper app - how many apps configured 1 media, 2 media etc) - only for apps with at list 2 different countries, at the first week of 2020. expected output of the above media apps 1 1 2 1 3 1 coderpad sql task https://app.coderpad.io/
Spark concepts in depth AWS services Kafka services in depth DSA array and bst System design for Big data pipelines
Given a dataset containing customer demographics, purchase history, and website interactions for an e-commerce company, how would you approach identifying patterns or trends that could inform marketing strategies to target specific customer segments?
I was asked about the power BI.
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