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Updated weekly · Last refresh Oct 17

Calsoft Software Engineer Interview Questions

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

50questions
~10htotal time
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1
CodingStart here. 24 questions + 1 drill · ~286 min
Linked List Duplicate ElementsMedium
Practice

Traverse a linked list and return unique duplicate values in first-occurrence order using a hash set.

Calsoft
Custom Power Function in PythonMedium
Practice

Compute x raised to an integer exponent using exponentiation by squaring without pow(), **, or bitwise operators.

pythonCalsoft
Python Coding TaskMedium
Practice
Practice drill

Calculate each customer's qualified payment count and total for the first quarter of 2025.

CodingJoinsData ManipulationVisa
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2
Security & Infrastructure8 questions · ~92 min
DevOps Tools and UsageMedium

Evaluates DevOps tooling knowledge and practical application.

ToolsDevOpsCalsoft
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3
Technical Fundamentals7 questions · ~80 min
OS and C/C++ FundamentalsMedium

Assesses systems fundamentals and ability to connect them to practical work.

Operating SystemsCalsoft
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4
Behavioral & Leadership6 questions · ~69 min
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5
More topics5 questions · ~57 min
Pandas DataFrame ManipulationMedium

Assesses data manipulation skills with pandas.

pandasData ManipulationCalsoft
DevOps and Big Data ToolsMedium

Evaluates familiarity with data processing tools used in enterprise pipelines.

hadoopCalsoft
System Design for a Desired SystemMedium

Evaluates your system design thinking and ability to structure a solution.

designCalsoft
Walk Through Recent ArchitectureMedium

Tests ability to explain system design, components, and architectural decisions clearly.

project experiencetechnical discussionarchitectureCalsoft
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Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
Dictionary Key TypesMedium
Practice
Practice drill

Identify repeated two-column key combinations, including combinations containing NULL values.

null handlingData ManipulationData StructuresPoint72
Python List and Dictionary BasicsMedium
Practice
Practice drill

Use PostgreSQL aggregations to produce list-like arrays and dictionary-like JSON objects from data records.

Data ManipulationData WranglingData StructuresExl
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.