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Updated weekly · Last refresh Oct 17

Coding it Forward Software Engineer Interview Questions

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

29questions
~4htotal time
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1
CodingStart here. 7 questions · ~65 min
Longest Substring Without RepeatsMedium
Practice

Find the longest substring with all unique characters using a sliding window.

Hash TablesStringsTwo PointersCoding it Forward
Programming Languages and RationaleEasy
Practice

Format a concise response listing programming languages and the reason for comfort with each.

Codingclean codeMathCoding it Forward
Sorting Algorithm ReasoningEasy

Tests your algorithmic reasoning, correctness thinking, and complexity awareness.

RecursionSortingCoding it Forward
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2
Execution19 questions · ~176 min
Describe a Previous ProjectEasy

Describe a past engineering project with focus on ownership, stakeholder alignment, communication, and risk management.

CommunicationOwnershipCoding it Forward
Balance Debt Against Feature DeliveryMedium

Explain how you would balance technical debt reduction with feature delivery when stakeholders want visible progress but engineering risk is rising.

Trade-offsRisk AssessmentScope ManagementCoding it Forward
Explain Technical Work to Business StakeholdersMedium

Show how you translate technical concepts into clear business language for non-technical stakeholders during project execution.

Stakeholder ManagementTechnical FluencyCommunicationCoding it Forward
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3
More topics3 questions · ~28 min
Interactive Public Data MapHard

Evaluates system design choices for building a high-performance, interactive public data map.

Coding it Forward
E-Commerce Database Schema DesignHard

Tests your data modeling skills, normalization tradeoffs, and support for common e-commerce queries.

JoinsGroup ByData ModelingCoding it Forward
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Detect Consecutive Losing StreaksMedium
Practice
Practice drill

Identify bet365 users with consecutive losing bets above a risk threshold using ordered streak grouping.

abuse trackingData Manipulationsql querybet365
Database Indexing Trade-OffsHard
Practice
Practice drill

Analyze a food-order total query and explain index trade-offs for filtering, joins, aggregation, and write overhead.

Trade-offsdatabase optimizationJoinsHelloFresh
Database Indexing Trade-offsHard
Practice
Practice drill

Compare PostgreSQL index strategies by read latency, write overhead, storage size, and an overall cost score.

Trade-offsdatabase optimizationdatabase managementHHostinger InternationalPPorch GroupCapital Technology Group
The finish line: interview-readyComplete all 29 questions plus 3 hands-on drills to finish this plan.