Data Engineer Interview Questions

18,677 data engineer interview questions shared by candidates

# Q1: Write a function to intersect two *sorted* lists (find common elements) # Write a method taking two lists as input, and returning a new list # You can assume you have a reasonable array/list class available (ArrayList, vector, python list, etc) # Ex: # l1 = [1,2,3,4,5] # l2 = [1,5,7,11,100] # result = [1,5]
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Software Engineer/Data Scientist

Interviewed at Tripadvisor

3.5
Oct 29, 2014

# Q1: Write a function to intersect two *sorted* lists (find common elements) # Write a method taking two lists as input, and returning a new list # You can assume you have a reasonable array/list class available (ArrayList, vector, python list, etc) # Ex: # l1 = [1,2,3,4,5] # l2 = [1,5,7,11,100] # result = [1,5]

Implement a library function which takes a collection of integers (Collection<Integer>) computes its sum and returns the result. The implementation must establish preconditions which ensure lack of runtime error(s). Implement the above function using recursion only.
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Data Engineer

Interviewed at impact.com

3.7
Aug 9, 2018

Implement a library function which takes a collection of integers (Collection<Integer>) computes its sum and returns the result. The implementation must establish preconditions which ensure lack of runtime error(s). Implement the above function using recursion only.

2) create daily revenue report between given start_date and end_date output schema: (order_date, number_of_customers, number_of_orders, daily_total_order_amount, mtd_order_amount) mtd_order_amount - total order_amt from the beginning of the month till order_date
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Data Engineer - Business Intelligence

Interviewed at Amazon

3.5
Apr 6, 2018

2) create daily revenue report between given start_date and end_date output schema: (order_date, number_of_customers, number_of_orders, daily_total_order_amount, mtd_order_amount) mtd_order_amount - total order_amt from the beginning of the month till order_date

Calculating percentage of sales percentage of non dat and regular products Calculating percentage of sales that matched the start date and end date of the promotion Fill the none values in a list with the previous non none value
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Data Engineer

Interviewed at Meta

3.6
Oct 7, 2020

Calculating percentage of sales percentage of non dat and regular products Calculating percentage of sales that matched the start date and end date of the promotion Fill the none values in a list with the previous non none value

try to get a pattern out of string or json. ask you to translate numbers from 1 to 100 to names of numbers ( for example 34 translated to thirty-four). you need to come with a solution within 10 seconds, I am able to get it done within 2 minutes. That's not fast enough.
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Senior Data Engineer

Interviewed at Meta

3.6
May 8, 2018

try to get a pattern out of string or json. ask you to translate numbers from 1 to 100 to names of numbers ( for example 34 translated to thirty-four). you need to come with a solution within 10 seconds, I am able to get it done within 2 minutes. That's not fast enough.

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