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Updated weekly · Last refresh Sep 22

Deloitte Software Engineer Interview Questions

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

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1
SQL & Data ManipulationStart here. 4 questions + 2 drills · ~53 min
SQL vs NoSQL for Deloitte SystemsMedium

Explain how SQL and NoSQL differ in schema, consistency, scaling, and use cases for enterprise data platforms.

nosqlsqldatabasesDeloitte
Explain OOP and SQL BasicsEasy
Practice

Explain core OOP concepts and write a PostgreSQL query that summarizes employees by department.

JoinsData Manipulationdatabase queryingDeloitte
Design a Database for BookingsMedium

Assesses data modeling skills and practical SQL/data design for a real product.

database designDeloitte
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
Top Customers by Net SalesMedium
Practice
Practice drill

Compute top 10 customers by net sales using joins and aggregations, ordering by revenue with deterministic tie-breaking.

SubqueriesJoinsData WranglingGain DigitalTCSZest AI
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2
Coding9 questions · ~73 min
Valid Parentheses and Linked ListsMedium
Practice

Traverse a linked list of brackets and validate balanced parentheses using a stack.

Linked ListsData StructuresAlgorithmsDeloitte
Polymorphism vs InheritanceEasy

Assesses core OOP concepts and ability to distinguish related terms.

Deloitte
Data Structures and Algorithms PracticeMedium
Practice

Organize a repeatable algorithm-solving workflow by clarifying requirements, evaluating approaches, and selecting the best complexity trade-off.

CodingData StructuresAlgorithmsDeloitte
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3
Behavioral & Leadership22 questions · ~180 min
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4
More topics2 questions · ~16 min
AI and Automation Case StudyHard

Explain a real AI and automation project, including its business problem, execution approach, stakeholder decisions, and measurable impact.

AIdelivery managementAutomationDeloitte
LLM Models in Your ProjectMedium

Evaluates applied ML understanding and ability to justify model selection.

project experienceDeloitte

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