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Wedbush Securities Software Engineer Interview Questions

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

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1
CodingStart here. 4 questions · ~33 min
Abstract Classes vs InterfacesEasy

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

javaabstractionoopWedbush Securities
Linked Lists vs ArraysEasy

Compare arrays and linked lists by memory layout, access cost, and update performance, and explain when each is the better choice.

Linked ListsArraysSearchingWedbush Securities
Hash Table Basics and ComplexityEasy

Explain how hash tables store data, handle collisions, and why their operations are usually O(1) on average.

InfrastructureToolsWedbush Securities
Binary Tree and OOPMedium

Tests your fundamentals in data structures and your ability to connect them to OOP design.

Data StructuresoopWedbush Securities
2
Behavioral & Leadership10 questions · ~84 min
Debugging an Undocumented Legacy SystemMedium

Tests ownership and problem-solving under ambiguity in a poorly documented legacy system, including how the candidate leaves lasting improvements behind.

legacy systemsDebuggingdocumentationWedbush Securities
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3
More topics3 questions · ~25 min
Ensuring Transaction Data IntegrityMedium

Tests your understanding of transactional guarantees, constraints, and consistency strategies.

acid propertiestransactionsdata integrityWedbush Securities
BGP and Nexus 7KMedium

Assesses your knowledge of network routing concepts and practical experience with Cisco Nexus 7K.

NetworkingWedbush Securities
SQL Join TypesMedium

Evaluates your understanding of SQL join semantics and when to use each join type.

JoinssqlWedbush Securities

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL Duplicate Record DetectionEasy
Practice
Practice drill

Find duplicate American Institutes for Research assessment submissions using a CTE, GROUP BY, HAVING, and joins.

deduplicationsqldata integrityAmerican Institutes for ResearchMacy's
Write a Query for Repeated RowsMedium
Practice
Practice drill

Find repeated Zomato order items using GROUP BY, HAVING, a CTE, and STRING_AGG.

sqldata integrityZomato
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
The finish line: interview-readyComplete all 17 questions plus 3 hands-on drills to finish this plan.