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Updated weekly · Last refresh Oct 16

Alten Calsoft Labs Software Engineer Interview Questions

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

50questions
~8htotal time
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1
CodingStart here. 15 questions · ~143 min
Reverse Words and Check AnagramsEasy
Practice

Reverse word order and test two strings for anagrams using tokenization and character frequency counting.

string manipulationAlgorithmsAlten Calsoft Labs
Middle of a Linked ListEasy
Practice

Find the second middle node of a singly linked list in one traversal using fast and slow pointers.

Linked ListsAlten Calsoft Labs
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2
Execution15 questions · ~143 min
Approach a Technical Phone InterviewEasy

Explain how you prepare for and navigate a technical phone interview centered on project execution experience and technical skills.

Success CriteriaRisk AssessmentScope ManagementAlten Calsoft Labs
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3
Security & Infrastructure5 questions · ~48 min
COBOL File Handling and DB2 PrecompileHard

Tests your legacy mainframe knowledge across COBOL, DB2 precompile, JCL, and VSAM error codes.

Alten Calsoft Labs
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4
System Design3 questions · ~29 min
Oracle Architecture and ConceptsHard

Evaluates your ability to explain complex system architecture and core concepts clearly.

architectureAlten Calsoft Labs
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5
Technical Fundamentals4 questions · ~38 min
React for Mobile and WebMedium

Assesses your understanding of React and how you think about mobile integration approaches.

mobile developmentreactAlten Calsoft Labs
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6
Behavioral & Leadership4 questions · ~38 min
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7
More topics4 questions · ~38 min
Testing and CI for PipelinesEasy

Explain how you apply automated testing and CI practices to data pipelines and pipeline releases.

InfrastructureToolsQualityAlten Calsoft Labs
SQL Query Optimization in MicroservicesHard

Tests your ability to diagnose and optimize database performance in distributed systems.

Window FunctionsJoinsAggregationsAlten Calsoft Labs
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Database Indexing Trade-OffsHard
Practice
Practice drill

Analyze a food-order total query and explain index trade-offs for filtering, joins, aggregation, and write overhead.

Trade-offsdatabase optimizationJoinsHelloFresh
Database Indexing Trade-offsHard
Practice
Practice drill

Compare PostgreSQL index strategies by read latency, write overhead, storage size, and an overall cost score.

Trade-offsdatabase optimizationdatabase managementHHostinger InternationalPPorch GroupCapital Technology Group
Database Trade-Offs for DetectionHard
Practice
Practice drill

Compare financial crime detection architectures using joined run metrics, aggregates, NULL handling, and ordered performance results.

fraud detectionTrade-offsdistributed databasesDeloitte
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.