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Johnson Controls Software Engineer Interview Questions

The questions to prepare for a Johnson Controls Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

50questions
~7htotal time
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1
CodingStart here. 10 questions · ~82 min
Abstract Classes vs InterfacesEasy
Recently asked

Compare Java abstract classes and interfaces, including inheritance rules, shared behavior, and when each is the better design choice.

javaabstractionoopJohnson Controls
Custom Linked List Node RemovalMedium
Recently asked

Tests pointer manipulation, linked list invariants, and careful handling of boundary cases.

Linked ListsfunctionsoopJohnson Controls
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2
Execution5 questions · ~41 min
Your Strengths and WeaknessesEasy

Tests self-awareness and how you position yourself for success in an Account Executive role at Aqr.

Trade-offsSuccess CriteriaRisk AssessmentJohnson Controls
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3
Security & Infrastructure23 questions · ~189 min
Ladder Logic and PIDMedium

Evaluates your understanding of control logic and PID concepts for industrial systems.

Johnson Controls
PLC, Transformers, and Control SystemsMedium

Assesses breadth of electrical and control-system fundamentals for machinery and building systems.

Johnson Controls
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4
System Design3 questions · ~25 min
Chiller Plant Management SystemMedium

Assesses understanding of HVAC chiller plant management concepts.

Johnson Controls
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5
Behavioral & Leadership6 questions · ~49 min
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6
More topics3 questions · ~25 min
OOP and SQL JoinsMedium

Evaluates understanding of OOP concepts and practical SQL join usage.

JoinssqlJohnson Controls
Transformer TypesMedium

Tests knowledge of data transformation components used in ML/data pipelines.

transformersdata processingETLJohnson Controls
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Top Earners via Table JoinMedium
Practice
Practice drill

Rank Motorola Solutions employees by total earnings using a LEFT JOIN, aggregation, COALESCE, and ROW_NUMBER.

JoinssqlMotorola SolutionsMotorola
Weekly Service KPI by TeamMedium
Practice
Practice drill

Analyze weekly service delivery performance by team using joins, a CTE, date aggregation, and KPI calculations.

KPIJoinssqlDeloitteReputation
Retention Cohorts With Complex JoinsHard
Practice
Practice drill

Build twelve-month Twitch viewer retention cohorts with CTEs, joins, date offsets, and conditional aggregation.

JoinssqlCohort AnalysisTwitch
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.