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Updated weekly · Last refresh Aug 30

a Day & Zimmermann Software Engineer Interview Questions

The questions to prepare for a a Day & Zimmermann Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

28questions
~4htotal time
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1
CodingStart here. 9 questions · ~80 min
Linked List ReversalEasy
Practice

Reverse a singly linked list in-place using iterative pointer manipulation.

RecursionLinked ListsArraysa Day & Zimmermann
Big O Notation ExamplesEasy

Tests algorithmic complexity reasoning and ability to reason about performance.

MathArraysSortinga Day & Zimmermann
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2
Execution3 questions · ~27 min
Adapting to Changing RequirementsEasy

Describe how you adapted when project requirements or the expected format changed midstream.

Trade-offsRisk AssessmentScope Managementa Day & Zimmermann
REST vs SOAP APIsEasy

Tests API design fundamentals and ability to choose the right approach for real constraints.

InfrastructureTrade-offsQualitya Day & Zimmermann
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3
System Design3 questions · ~27 min
System Design Tools and FrameworksEasy

Tests your practical approach to designing systems and your ability to justify tooling choices.

InfrastructureToolsData Modelinga Day & Zimmermann
Design for Millions of RequestsHard

Tests scalability, architecture choices, and reliability planning under high traffic.

InfrastructureFeature StoreModel Servinga Day & Zimmermann
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4
Behavioral & Leadership11 questions · ~98 min
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5
More topics2 questions · ~18 min
Database Design ApproachMedium

Tests your ability to design reliable, scalable database schemas for engineering and operations workloads.

JoinsData WranglingAggregationsa Day & Zimmermann
Salesforce Apex, LWC, SOQLMedium

Assesses your ability to build and query Salesforce features using Apex, LWC, and SOQL.

salesforcea Day & Zimmermann
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
SQL Top N QueryEasy
Practice
Practice drill

Return the 10 most-viewed active California physician profiles using WHERE, ORDER BY, and LIMIT.

RankingSortingAggregationsDoximity
Contact Center Agent Performance MetricsHard
Practice
Practice drill

Compute daily agent call KPIs and SLA using joins, aggregations, and window ranking in a contact center model.

ETLAggregationsData ModelingADP
The finish line: interview-readyComplete all 28 questions plus 3 hands-on drills to finish this plan.