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Data Engineer Coding Interview Questions

Review this list of 86 Coding Data Engineer interview questions and answers verified by hiring managers and candidates.

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Asked at LinkedIn, Oracle, TikTok • a year ago
Serialize and deserialize binary tree
Data Engineer
Coding
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Add answer I was asked this
Data Engineer
Coding
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Asked at Apple • a year ago
Sliding Window Maximum
Data Engineer
Coding
+1 more
Add answer I was asked this
Data Engineer
Coding
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Asked at Apple, Google, LinkedIn • a year ago
Calculate the height of a binary tree.
Data Engineer
Coding
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3 answers I was asked this
"Recursion: 0 if NULL, else 1+max(height(left), height(right))"
Mohith J. - "Recursion: 0 if NULL, else 1+max(height(left), height(right))"See full answer
Data Engineer
Coding
+3 more
Asked at Adobe, TikTok • a year ago
Print all possible solutions to the N-Queens problem.
Data Engineer
Coding
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Data Engineer
Coding
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Asked at Amazon • a year ago
Given an array of children’s ratings, assign at least one candy to each child so that higher-rated children get more than their neighbors, and return the minimum total candies needed.
Data Engineer
Coding
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Data Engineer
Coding
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Given a large set of CSV files with thousands of paragraphs each, how would you detect duplicates within each file, and how would you scale this solution for many files?
Data Engineer
Coding
1 answer I was asked this
"My brute force approach was to read them. Give a id to each paragraph and for each token count the number of time it has appeared. If any two rows look same , it is duplicated. Further , interviewer guided me that he will do it with hashing."
Payal B. - "My brute force approach was to read them. Give a id to each paragraph and for each token count the number of time it has appeared. If any two rows look same , it is duplicated. Further , interviewer guided me that he will do it with hashing."See full answer
Data Engineer
Coding

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