Chegg Data Engineer Interview Questions

The questions to prepare for a Chegg Data Engineer interview. Questions from real interview reports rank first. Updated weekly.

Data Cleaning in ETL Pipelines

Easy

Approach for cleaning and preparing raw data inside an ETL pipeline.

Data WranglingETLQuality

Chegg

Handle Incomplete Pipeline Data

Medium

Approach for handling missing, inconsistent, and duplicate data in a pipeline without breaking downstream analytics.

Data WranglingETLQuality

Chegg

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Clustered vs Non-Clustered Indexes

Medium

Explain how clustered and non-clustered indexes differ in storage, lookup behavior, and query performance.

JoinsData Wrangling

Chegg

Window Ranking in Ticket Queues

Medium

Explain SQL window functions and when to use ROW_NUMBER() versus DENSE_RANK() for ranked ticket analysis.

Window FunctionsRankingrow_number

Chegg

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Longest Substring Without Repeats

Hard

Tests algorithmic problem-solving and coding correctness under interview constraints.

Hash TablesStringsSliding Window

Chegg

Merge Two Sorted Lists

Easy

Tests basic coding ability and correctness for common data manipulation tasks.

ArraysSortingTwo Pointers

Chegg

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