The percentage of female customer base
Data Interview Questions
132,958 data interview questions shared by candidates
What is a Z-test? When would you use a Z test over a T test?
Say the DS team came up with a spam detection algorithm, what metrics would you use to measure success?
Solve 3 SQL problems
Python graph node count
Python Questions: Avg length of words, some of the edge cases are having spaces in the beginning and end of the words, returning a float instead of int, returning None for blank input. Valid ip address, edge case to remember is if there are alphanumeric characters. SQL questions: One SQL question was tricky because you have to look at the data to come up with the question, the question is to find the percent of valid promotion, condition to find valid promotion is not specified in the question, so you have to figure it from looking at the data. Other SQL questions are based on a join, group by, top(3)
How can we tell if two users on Instagram are best friends? (answer question) Ok, how can we use this algorithm in the product?
sql : inner join , cases , order by , limit python: avg length of sentence , valid IP address
What is the difference between Z test and T test?
Flatten a nested dictionary?? ( this was the hardest question in coder pad questions )
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