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Updated weekly · Last refresh Sep 15
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ACI Worldwide Software Engineer Interview Questions

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

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1
System DesignStart here. 5 questions · ~41 min
Spring Boot Project StructureMedium
Recently asked

Evaluates your understanding of Spring Boot application organization and components.

javaspring bootAACI Worldwide
Static Keyword and MemoryMedium
Recently asked

Assesses your understanding of class-level state, initialization, and memory implications.

memory managementjavaAACI Worldwide
Java Annotations in PracticeMedium
Recently asked

Assesses your ability to explain how annotations drive configuration and behavior in Java/Spring.

javaAACI Worldwide
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2
Technical Fundamentals4 questions · ~33 min
ArrayList vs LinkedListEasy
Recently asked

Tests your knowledge of Java collection tradeoffs that impact performance in Infor applications.

javaData StructuresAACI Worldwide
final vs finally vs finalizeMedium
Recently asked

Tests your understanding of Java language features and their correct usage.

javaprogramming conceptsAACI Worldwide
REST vs SOAPEasy
Recently asked

Tests your ability to compare API styles and choose appropriately for enterprise systems.

Stakeholder ManagementCommunicationAACI Worldwide
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3
Behavioral & Leadership3 questions · ~24 min
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4
More topics2 questions · ~16 min
Explain ACID in Transaction SystemsEasy
Recently asked

Explain the four ACID properties and why they matter for reliable transaction processing in SQL systems.

acid propertiestransactionsdata integrityAACI Worldwide
Explain SOLID PrinciplesEasy
Recently asked

Tests baseline understanding of SOLID design principles.

ArraysStringsAACI Worldwide

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL Queries for RankingMedium
Practice
Practice drill

Rank active HSBC employees by division and return every employee tied for the highest or second-highest salary.

javasqlHsbc
SQL Duplicate Record CleanupMedium
Practice
Practice drill

Identify duplicate transaction rows, retain the earliest record, and delete later duplicates safely.

deduplicationdata cleaningtransactionsOracleDiscoverBrooksource
Batch vs Streaming ReconciliationHard
Practice
Practice drill

Compare the latest batch and streaming versions of each record and report missing records and field-level mismatches.

inconsistent dataReconciliationtransactionsKeyrus France
The finish line: interview-readyComplete all 14 questions plus 3 hands-on drills to finish this plan.