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Updated weekly · Last refresh Sep 10

Inc. In Software Engineer Interview Questions

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

50questions
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1
SQL & Data ManipulationStart here. 8 questions + 2 drills · ~98 min
Window Functions and Top SalariesEasy
Practice

Use ROW_NUMBER and a CTE to return the three highest-paid employees in each Inc. In department.

Window FunctionsInc. In
Duplicate Transactions QueryMedium
Practice
Practice drill

Identify near-duplicate Mastercard authorizations with a self-join and rank matching transactions within two minutes.

Self-JoinssqlMastercardBank Of America Merrill LynchPitchbook Data
7-Day Rolling Active UsersMedium
Practice
Practice drill

Compute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.

Window FunctionsDate FunctionsRunning TotalsMetaSpotifyMeta IT
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2
Coding9 questions · ~87 min
Minimum Window Substring MatchHard
Practice

Use a sliding window and frequency counts to find the shortest substring containing all characters of t.

Hash TablesDynamic ProgrammingArraysInc. In
Maximum Subarray Using KadaneEasy
Practice

Compute the maximum contiguous subarray sum in O(n) time using Kadane's Algorithm.

Basic AlgorithmsDynamic ProgrammingArraysInc. In
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3
Security & Infrastructure9 questions · ~87 min
Networking and Routing ProtocolsHard

Evaluates your understanding of networking protocols relevant to infrastructure troubleshooting.

NetworkingprotocolsInc. In
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4
System Design9 questions · ~87 min
Designing an Instagram-Style AppHard

Evaluates tradeoff-driven system design thinking for large-scale consumer apps.

social mediaInc. In
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5
Technical Fundamentals5 questions · ~49 min
Test-Driven Development ConceptEasy

Tests your understanding of TDD principles and how it influences QA and development workflows.

CommunicationLeadershipOwnershipInc. In
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6
Execution7 questions · ~68 min
Kafka, Kubernetes, and AWS UsageHard

Assesses practical cloud and distributed systems knowledge and decision-making depth.

kafkaawsInc. In
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7
More topics3 questions · ~29 min
Integrating Two Databases in Spring BootMedium

Assesses your ability to design data access layers and manage multiple data sources.

spring bootInc. In
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The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.