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Updated weekly · Last refresh Aug 30

Boston Consulting Group Forward-Deployed Engineer Interview Questions

The questions to prepare for a Boston Consulting Group Forward-Deployed Engineer interview. Questions from real interview reports rank first. Updated weekly.

26questions
~4htotal time
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1
CodingStart here. 6 questions · ~54 min
Reconstruct Binary Tree TraversalsMedium
Practice

Rebuild a binary tree from preorder and inorder traversals using recursion and an index map in O(n) time.

RecursionArraysTreesBoston Consulting Group
LeetCode-Style Algorithm ApproachMedium

Tests problem-solving strategy and ability to improve beyond brute force.

AlgorithmsBoston Consulting Group
Implement Queue With Cyclic ListHard

Tests data structure implementation skills and correctness reasoning.

Data StructuresBoston Consulting Group
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2
Execution9 questions · ~81 min
Docker Setup via Remote AccessMedium

Evaluates practical DevOps skills for container setup in constrained environments.

dockerBoston Consulting Group
Deploying AI Model Trade-offsMedium

Evaluates decision-making around AI deployment trade-offs such as latency, cost, and reliability.

Trade-offsBoston Consulting Group
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3
SQL & Data Manipulation5 questions + 3 drills · ~75 min
HTTP Caching and SSL BasicsMedium

Assesses knowledge of SSL and HTTP caching behavior relevant to production systems.

cachingBoston Consulting Group
SQL Query Writing Under ConstraintsMedium

Evaluates ability to write and debug non-trivial SQL for real data tasks.

sqlBoston Consulting Group
Database Performance OptimizationMedium

Tests ability to improve database performance through query and system optimization.

database optimizationperformancesqlBoston Consulting Group
Top Customers by Region VolumeMedium
Practice
Practice drill

Find the top 3 customers in each region by transaction volume using joins, aggregation, and window ranking.

Window FunctionsJoinsRankingJPMorganChaseSilicon Valley BankNavi
Calculate Monthly Sales Growth by Product CategoryMedium
Practice
Practice drill

Calculate month-over-month sales growth for each product category using JOINs and window functions.

JoinsAggregationsWayfairREVOLVEFanatics
Analyze Customer Purchase Trends with Window FunctionsEasy
Practice
Practice drill

Calculate the monthly spending trends for customers using window functions and joins.

The Home DepotAvisoWorld Wide Technology
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4
Behavioral & Leadership6 questions · ~54 min
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The finish line: interview-readyComplete all 26 questions plus 3 hands-on drills to finish this plan.