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European Southern Observatory Interview Questions

The questions to prepare for European Southern Observatory interviews, across all roles. Questions from real interview reports rank first. Updated daily.

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1
Technical FundamentalsStart here. 9 questions · ~72 min
Shared_ptr vs unique_ptrMedium

Evaluates smart pointer semantics and usage scenarios.

memory managementEEuropean Southern Observatory
Python decorators and usageMedium

Assesses understanding of Python decorators and practical use cases.

ProgrammingdecoratorspythonEEuropean Southern Observatory
Templates versus inheritance in C++Medium

Assesses design choices between templates and inheritance in C++.

c++EEuropean Southern Observatory
Key C++ changes in the last decadeMedium

Evaluates awareness of modern C++ evolution and impact on development.

Programmingc++EEuropean Southern Observatory
Tooling decision: C++ or PythonMedium

Assesses language choice reasoning in the ESO context.

pythonc++EEuropean Southern Observatory
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2
Behavioral & Leadership5 questions · ~40 min
Resolving a High-Stakes Technical ProblemEasy

Tests ownership and judgment in solving a difficult technical problem under ambiguity, including prioritization, communication, and measurable results.

OwnershipDealing With AmbiguityEEuropean Southern Observatory
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3
More topics2 questions · ~16 min
Diagnosing performance issues with basic toolsMedium

Evaluates methodical troubleshooting and tool selection.

ToolsDiagnosisEEuropean Southern Observatory
Error handling for hardware controlMedium

Tests fault tolerance and robust error handling in hardware interfaces.

error handlingHardwareEEuropean Southern Observatory

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