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18,773 data engineer interview questions shared by candidates

// Given a singly linked list without values defined by: class Node { Node next } // Write a function that removes all elements from the list whose _index_ is a fibonacci number // o -> o -> o -> o -> o -> o -> o -> o -> o -> o -> o -> o // 0 1 2 3 4 5 6 7 8 9 10 11 // x x x x x // becomes // o ----------------> o ------> o -> o ------> o -> o -> o // 0 4 6 7 9 10 11
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Software Engineer/Data Scientist

Interviewed at Tripadvisor

3.5★
Oct 29, 2014

// Given a singly linked list without values defined by: class Node { Node next } // Write a function that removes all elements from the list whose _index_ is a fibonacci number // o -> o -> o -> o -> o -> o -> o -> o -> o -> o -> o -> o // 0 1 2 3 4 5 6 7 8 9 10 11 // x x x x x // becomes // o ----------------> o ------> o -> o ------> o -> o -> o // 0 4 6 7 9 10 11

The tech interview had 3 different task, all timed separately: 1. Read about a business context and update an existing SQL schema to make it work for the context 2. Write a fairly complex SQL query to achieve a certain result 3. Write some API type code in a language of your choice per a specification. Pass given tests but also write more tests
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Senior Data Engineer

Interviewed at Paradigm Health

3.9★
Apr 21, 2023

The tech interview had 3 different task, all timed separately: 1. Read about a business context and update an existing SQL schema to make it work for the context 2. Write a fairly complex SQL query to achieve a certain result 3. Write some API type code in a language of your choice per a specification. Pass given tests but also write more tests

1st round - Your current project architecture Python coding question - hello and olleh how to check all characters exist in both strings? SQL coding question of joining multiple tables and derive few attributes. 2nd Round - Managerial and non technical How to resolve conflicts at work? 3rd Round - How to delete duplicates from a table? (This questions was asked even though they were hiring for OLAP project setup) Current project and architecture etc. How did you train and evaluate ML models? Question on Oracle index How resolve conflict at work? (Same question again in this round)
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Data Engineer

Interviewed at Cornerstone OnDemand

3.2★
Jul 12, 2024

1st round - Your current project architecture Python coding question - hello and olleh how to check all characters exist in both strings? SQL coding question of joining multiple tables and derive few attributes. 2nd Round - Managerial and non technical How to resolve conflicts at work? 3rd Round - How to delete duplicates from a table? (This questions was asked even though they were hiring for OLAP project setup) Current project and architecture etc. How did you train and evaluate ML models? Question on Oracle index How resolve conflict at work? (Same question again in this round)

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