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Wissen Technology Software Engineer Interview Questions

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

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1
CodingStart here. 23 questions · ~240 min
Linked List ReversalEasy
Practice

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

RecursionLinked ListsArraysWissen Technology
Flatten a Nested ArrayEasy
Practice

Flatten a nested array into a single list using recursion or an explicit stack while preserving left-to-right order.

RecursionStackArraysWissen Technology
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2
System Design7 questions · ~73 min
Design Patterns for MicroservicesMedium
Recently asked

Tests your system design judgment for reliability, scalability, and maintainability in microservices.

system architecturedesign patternsmicroservicesWissen Technology
Database Design for Food DeliveryHard

Assesses data modeling and database design for a real-world delivery domain.

scalabilitydatabase designWissen Technology
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3
SQL & Data Manipulation12 questions + 3 drills · ~155 min
Optimizing Slow SQL QueriesHard
Recently asked

Tests your SQL performance troubleshooting skills and ability to improve throughput.

performanceWissen Technology
HashMap and Use CasesMedium

Assesses Java collections understanding and practical use-case reasoning.

Use CasesWissen Technology
SQL: Customers With Multiple OrdersEasy
Practice
Practice drill

Use a join, month-level grouping, and HAVING to find VistaPrint customers with multiple orders in the same month.

aggregationJoinssqlCCimpress Technology
SQL for Top Customer SpendMedium
Practice
Practice drill

Rank the top three EPAM India customers by item-level spending over the last three months using joins and aggregation.

aggregationJoinssqlEEPAM IndiaEPAM Systems
Top SQL Join and GroupingEasy
Practice
Practice drill

Return the top three students in each Nomura division using a join and ROW_NUMBER partitioned by division.

aggregationJoinssqlNomura
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4
Behavioral & Leadership6 questions · ~63 min
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5
More topics2 questions · ~21 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 AssessmentWissen Technology
JVM Garbage Collection in Java 8Medium

Evaluates JVM internals knowledge and performance awareness.

Wissen Technology

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