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Top 21
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Updated weekly · Last refresh Sep 20

ICON Software Engineer Interview Questions

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

21questions
~3htotal time
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1
SQL & Data ManipulationStart here. 7 questions + 3 drills · ~87 min
DBMS vs RDBMSEasy

Assesses your foundational understanding of database systems and relational modeling concepts.

ICON
Web APIs and SQL ServerMedium

Evaluates your ability to connect application services with relational data in production systems.

ICON
Validating Datasets and TFLsMedium

Tests dataset and TFL validation practices for regulatory-grade clinical reporting.

data validationICON
Optimizing Slow SQL QueriesHard
Practice
Practice drill

Optimize a PostgreSQL transaction query that filters, aggregates, ranks, and returns top merchants efficiently on large tables.

Performance Tuningdatabase optimizationlarge datasetsSprinter HealthSentiLinkAutodesk
SQL Random Generator and DedupMedium
Practice
Practice drill

Remove duplicate trade events while retaining the earliest trade ID for each identical event.

data cleaningData ManipulationsqlJefferies
Consecutive Numbers SQLMedium
Practice
Practice drill

Find numbers repeated across three consecutive dataset positions using a self-join.

Data Manipulationsqldatabase queryingTredence
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2
Execution3 questions · ~24 min
Automating Manual ReportingMedium

Tests approach to automation, requirements gathering, and building reliable reporting workflows.

process improvementAutomationreportingICON
Reproducible, Audit-Ready CodeMedium

Tests ability to produce traceable, repeatable outputs that meet audit and compliance expectations.

quality controlaudit readinessICON
Delegation and Quality ControlMedium

Tests leadership, task management, and quality assurance practices in a team setting.

quality controlTeam ManagementICON
3
Behavioral & Leadership9 questions · ~73 min
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4
More topics2 questions · ~16 min
Angular, CSS, and JavaScriptMedium

Assesses frontend engineering skills and practical problem-solving with UI technologies.

javascriptcssICON
Java vs JavaScriptEasy

Tests your foundational understanding of programming languages and correct terminology.

MathArraysStringsICON

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