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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 weekly.

50questions
~8htotal time
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1
CodingStart here. 17 questions · ~159 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
Kth Smallest in 2D ArrayHard
Practice

Find the kth smallest matrix value using a min-heap while exploiting sorted rows and columns.

ArraysSearchingMatrixAlten Calsoft Labs
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2
Execution17 questions · ~159 min
Clarify Ambiguous Project RequirementsMedium

Explain how you turn vague requirements into aligned scope, clear decisions, and shared understanding for the team.

ClarityDealing With AmbiguityProject ManagementAlten Calsoft Labs
Explain Technical Trade-offs ClearlyEasy

Explain technical trade-offs to non-technical stakeholders in a way that drives alignment and decision-making.

Trade-offsSuccess CriteriaRisk AssessmentAlten Calsoft Labs
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3
Security & Infrastructure5 questions · ~47 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 · ~28 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
Behavioral & Leadership4 questions · ~37 min
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6
More topics4 questions · ~37 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
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
Longest Consecutive Login Streak per UserHard
Practice
Practice drill

Calculate the longest consecutive login streak for each user using window functions and date manipulations.

Window FunctionsJoinsAggregationsChimeECSSalesforce
SQL for Weekly Regional PerformanceMedium
Practice
Practice drill

Calculate weekly volume, handling time, and week-over-week change by Kuiper Commercial Services region.

Window FunctionsJoinsAggregationsAmazon Kuiper Commercial Services
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.