Can you give a specific example when you found something and told the business, and they were engaged/reacted?
Senior
148
Data Analyst
296
0
Will the stock returns be normally distributed? (minute-by-minute price increases from 2000 to 2026)?
Intern
148
В чем разница между оконными функциями ROW_NUMBER, RANK и DENSE_RANK?
Middle
147
What is the memory complexity of the Product of Array Except Self problem and what additional variables are used?
Intern
147
Do you have any questions for the interviewer?
Intern
147
Tell me about yourself: who are you, what do you do, and what are your hobbies?
Intern
146
Presented are tables A and B: select * from A +----+-----+ |id |val | +----+-----+ |1 |A | |2 |B | |3 |C | +----+-----+ select * from B +----+-----+ |id |val | +----+-----+ |1 |A | |2 |B | |3 |C | |4 |A | +----+-----+ Will the results returned by the following queries differ? 1 select * from A left join B on A.id = B.id and B.val = 'A' 2 select * from A left join B on A.id = B.id where B.val = 'A'
Middle
146
How did you verify data and understand that you can trust it? Was there any algorithm?
Middle+
146
What integrations have you implemented and what exactly did you do? (Kafka, REST, RabbitMQ, synchronous/asynchronous)
Middle
146
What projects are you interested in — only technical or do you consider consulting? What do you want to develop?
146
What is the difference between the DROP and TRUNCATE commands?
Middle
146
When are you ready to start working if all stages are successfully passed? Are there planned vacations?
Middle+
145
How were the model hyperparameters selected and how was the quality measured?
Intern
145
What is a list comprehension?
Intern
145
Write a complete sum_series function in Python and test it with an example from the task.
Intern
145
Tell me about the ETL process. What do you know about it?
Middle
145
Where in real life does the normal distribution occur, and where does it not? Provide specific examples with explanations why data is normally distributed or not.
Intern
145
Why are COUNT and GROUP BY used?
Intern
145
How would you create a geometry benchmark? Describe the chain from idea to final dataset.
Intern
145
What are the most common errors encountered in BI? Which ones have you faced?
Middle+
144