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Updated weekly · Last refresh Aug 30

Facebook Data Engineer Interview Questions

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

37questions
~5htotal time
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1
CodingStart here. 10 questions · ~85 min
Most Common Element Across CategoriesEasy
Practice
Recently asked

Find the most frequent item across Facebook surfaces using a frequency map, counting duplicates and breaking ties lexicographically.

frequency countData StructurespythonFacebook
Compute Metrics with Edge CasesMedium
Recently asked

Tests coding skill for implementing statistical metrics robustly with tricky inputs.

statisticspythonedge casesFacebook
Max Consecutive Events Meeting ConditionMedium
Recently asked

Tests coding skills for scanning sequences and handling consecutive-condition logic.

time complexitypythonFacebook
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2
SQL & Data Manipulation14 questions + 3 drills · ~149 min
Average Payment by User GroupMedium
Recently asked

Tests SQL filtering and aggregation with segmentation dimensions.

sql queriesAggregationsFacebook
Unique Paying Customers AggregationsHard
Recently asked

Tests advanced SQL aggregation patterns and distinct counting on large transaction datasets.

sql queriesFacebook
Top Customers by Referred UsersMedium
Recently asked

Tests SQL joins, referral attribution, and ranking using aggregated revenue.

sql queriesAggregationsFacebook
Analyze Signup Funnel Drop-OffHard
Practice
Practice drill

Use CTEs, joins, and aggregations to measure user drop-off across a multi-step signup funnel.

JoinsCase WhenAggregationsFacebookIntuitAsana
SQL Day-Over-Day GrowthMedium
Practice
Practice drill

Calculate daily active Instagram Creators and day-over-day growth using a date spine, aggregation, and LAG.

Date FunctionsAggregationsFacebook
SQL Retention Rate QueryMedium
Practice
Practice drill

Calculate Disney+ January cohort retention in February using a CTE, LEFT JOIN, date filters, and distinct user counts.

sql queryData AnalysisHelloFreshDDisney Entertainment & SportsFacebook
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3
Behavioral & Leadership11 questions · ~94 min
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4
More topics2 questions · ~17 min
System Architecture DesignHard

Assesses architecture thinking, tradeoffs, and validation for building data systems.

system designarchitectureFacebook
Bookstore Checkout System DesignHard

Evaluates end-to-end system design for a transactional data model and analytics-ready schema.

system designFacebook
The finish line: interview-readyComplete all 37 questions plus 3 hands-on drills to finish this plan.