Data engineers are IT professionals who are needed in almost every industry. Data engineers monitor data trends to determine best next steps for companies. A critical part of a data engineer job is to process raw data into usable data by creating data pipelines and building data systems.
you are given a dictionary where the key is location of book store and value is the list of reviews as string. the list can have duplicate values. return the most frequent review across all locations after removing the duplicate review for each location.
Manager want to analyze the how the promotions on certain products are performing.find how the the percent of promoted sales?
python :average length of words.
High level SQL questions, Designing a database given a scenario and questions based on that, join optimization, reporting SQL questions without using special functions like lag.
Can't remember them, but I know it wasn't the simple stuff like basic commands. CD, LS, PWD, RM, MV, TOUCH etc.
Phone call with recruiter with 5 SQL, 5 Python questions
Python: 1. count occurrence of a word , 2. Uncommon words from two sentences 3. Replace None with previous value SQL: questions on Sales, Promotion, Product tables. Calculation of percentage of total sales on start and end dates with overall sales, etc.
Sql, python and data modeling
Select a couple columns from a single table where one column equals a keyword.
Given a table of users and whom they sent friend requests to, what is the average number of friend requests sent in the last week?
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