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We Are Apt Interview Questions

The questions to prepare for We Are Apt interviews, across all roles. Questions from real interview reports rank first. Updated daily.

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1
PipelinesStart here. 4 questions · ~33 min
Cleaning Missing Values in PipelinesEasy
Recently asked

Approach for handling missing values in a pipeline with data quality checks and repeatable transformations.

Data WranglingETLQualityWe Are Apt
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2
Statistics & Probability4 questions · ~33 min
Expected Flips for Two HeadsMedium

Compute the expected waiting time to see two consecutive heads when flipping a fair coin.

DistributionsExpected ValueConditional ProbabilityWe Are Apt
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3
Coding15 questions · ~125 min
Dynamic Data Structures ComplexityHard

Tests problem-solving skills with dynamic data structures and time complexity reasoning.

Problem SolvingWe Are Apt
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4
Security & Infrastructure5 questions · ~42 min
Process Synchronization in MultithreadingMedium

Evaluates ability to design correct synchronization to avoid race conditions and deadlocks.

concurrencyWe Are Apt
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5
Machine Learning3 questions · ~25 min
Options Straddle ExperimentationHard

Evaluates depth of options strategy experimentation and quantitative reasoning.

Data StructuresWe Are Apt
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6
Behavioral & Leadership5 questions · ~42 min
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7
More topics4 questions · ~33 min
Debugging Intermittent Performance IssuesMedium

Evaluates debugging methodology for non-deterministic performance problems.

Problem SolvingDebuggingWe Are Apt
Partitioning and Indexing for QueriesMedium
Recently asked

Assesses your approach to physical data design for faster, more scalable queries.

indexingWe Are Apt
Portfolio Gamma Underlying MovesMedium

Assesses understanding of gamma behavior and its impact on straddle P&L.

We Are Apt
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Python List and Dictionary BasicsMedium
Practice
Practice drill

Use PostgreSQL aggregations to produce list-like arrays and dictionary-like JSON objects from data records.

Data ManipulationData WranglingData StructuresExl
Dictionary Key TypesMedium
Practice
Practice drill

Identify repeated two-column key combinations, including combinations containing NULL values.

null handlingData ManipulationData StructuresPoint72
Unique Elements and Top-K FrequenciesMedium
Practice
Practice drill

Return the first row for each unique value, then rank the k most frequent values.

large datasetsData Structurescomplex queriesEverlaw
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