Top 40
Prep plan
Updated weekly · Last refresh Oct 17
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BCG Software Engineer Interview Questions

The questions to prepare for a BCG Software Engineer interview. Questions from real interview reports rank first. Updated daily.

40questions
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1
CodingStart here. 12 questions · ~122 min
Square Pattern ConstructionEasy
Practice

Construct an n by n hollow square as an array of strings using asterisks and spaces.

ArraysArray ManipulationAlgorithmsBBCG
Longest Distinct SubstringMedium
Practice

Find the longest substring without repeated characters using a sliding window and two pointers.

coding challengeArraysSliding WindowBBCG
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2
Behavioral & Leadership22 questions · ~223 min
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3
More topics6 questions · ~61 min
Project-Specific ExecutionMedium

Explain how you owned a project from planning through delivery, including trade-offs, stakeholder coordination, risks, and outcomes.

Executiondelivery managementProject ManagementBBCG
DSA and SQL PracticeMedium

Assesses algorithmic thinking and practical SQL query skills.

sql queriesBBCG
Deploy an End-to-End ML ModelMedium

Assesses system thinking for ML deployment, including components and operational concerns.

deploymentBBCG
Architecture of a Significant ProjectMedium

Tests ability to explain system design decisions and align architecture with business needs.

project experiencesystem architecturetechnical depthBBCG
Backend Endpoints and PrinciplesMedium

Evaluates backend implementation skills and your use of engineering best practices.

BBCG
SQL Joins and Backend TopicsMedium

Tests SQL join understanding and your ability to use it in backend scenarios.

JoinssqlBBCG

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
The finish line: interview-readyComplete all 40 questions plus 3 hands-on drills to finish this plan.