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438,338 software engineer data interview questions shared by candidates

Given a list of ints, balance the list so that each int appears equally in the list. Return a dictionary where the key is the int and the value is the count needed to balance the list. [1, 1, 2] => {2: 1} [1, 1, 1, 5, 3, 2, 2] => {5: 2, 3: 2, 2: 1}
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Data Engineer

Interviewed at Meta

3.5★
Aug 17, 2021

Given a list of ints, balance the list so that each int appears equally in the list. Return a dictionary where the key is the int and the value is the count needed to balance the list. [1, 1, 2] => {2: 1} [1, 1, 1, 5, 3, 2, 2] => {5: 2, 3: 2, 2: 1}

SQL questions on promotions, sales schema. what %age of products have both non fat and trans fat. find top 5 sales products having promotions what %age of sales happened on first and last day of the promotion Mysql was used and interviewer asked to if this can be done without subquery. Python:- [1,None,1,2,None} --> [1,1,1,2,2] Ensure you take care of case input[None] which means None object. find s in missisipi.
avatar

Data Engineer

Interviewed at Meta

3.5★
Jun 29, 2020

SQL questions on promotions, sales schema. what %age of products have both non fat and trans fat. find top 5 sales products having promotions what %age of sales happened on first and last day of the promotion Mysql was used and interviewer asked to if this can be done without subquery. Python:- [1,None,1,2,None} --> [1,1,1,2,2] Ensure you take care of case input[None] which means None object. find s in missisipi.

This was not unexpected but a bit difficult. How would you represent the ordering of a deck of card if you only have 32bytes to work with. So, he explained that you have 52 objects, there are 52! possible ordering of them. how to encode one of those ordering within 32 bytes?
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Software Development Engineer

Interviewed at Amazon

3.5★
Oct 2, 2011

This was not unexpected but a bit difficult. How would you represent the ordering of a deck of card if you only have 32bytes to work with. So, he explained that you have 52 objects, there are 52! possible ordering of them. how to encode one of those ordering within 32 bytes?

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