Parsons Software Engineer Interview Questions

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

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CodingStart here. 22 questions · ~223 min

FizzBuzz 1 to 100Easy

Practice

Generate FizzBuzz labels for an integer range using divisibility checks and correct precedence for multiples of both 3 and 5.

coding challengeAlgorithms

Parsons

Square Check ProblemEasy

Practice

Determine whether an integer is a perfect square using an exact integer-square-root check.

Basic AlgorithmsAlgorithmsvalidation

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Security & Infrastructure7 questions · ~71 min

Preventing SQL InjectionHard

Apply parameterized queries, safe dynamic SQL patterns, least privilege, testing, and monitoring to protect legacy and modern applications.

code qualityapplication securitysql injection

Parsons

Finding IP on Windows/LinuxMedium

Tests practical networking and security troubleshooting knowledge for identifying host IPs.

Networking

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Technical Fundamentals4 questions · ~41 min

Race Conditions in Multi-ThreadingHard

Tests how to identify race conditions and choose synchronization, atomic operations, or concurrent collections on the JVM.

Async ProgrammingJVM Internalstechnical fundamentals

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Deep Dive: Favorite Technical ProjectHard

Evaluate whether the candidate can explain a technical project through architecture, runtime behavior, trade-offs, debugging, and measurable results.

system designtechnical experiencetechnical fundamentals

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System Design5 questions · ~51 min

Stormwater and Sewer Network DesignHard

Evaluates domain-specific engineering reasoning and your ability to structure a technical design approach.

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Execution3 questions · ~30 min

Rapid Delivery vs MaintainabilityMedium

Tests engineering judgment around tradeoffs, quality practices, and sustainable delivery.

Trade-offscode maintainability

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Behavioral & Leadership9 questions · ~91 min

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