66degrees Full Stack Engineer Interview Questions

The questions to prepare for a 66degrees Full Stack Engineer interview. Questions from real interview reports rank first. Updated daily.

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Technical FundamentalsStart here. 5 questions · ~40 min

Tests understanding of React lifecycle and performance implications.

React Functional vs Class ComponentsMedium

Assesses understanding of component paradigms in React.

react

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Python for Backend in Cloud-Native EnvironmentsMedium

Evaluates rationale for Python in cloud-native backends.

pythoncloud-native

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Optimize Python for High ConcurrencyHard

Tests techniques for concurrency, performance tuning in Python.

performance optimizationpythonconcurrency

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System Design4 questions · ~32 min

Evaluates approach to authN/authZ across front and back end.

Design a Scalable Web App with Python and ReactHard

Evaluates system design for a Python/React stack.

reactscalable architecturepython

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High-Performance DB Schema DesignMedium

Assesses database schema design for performance.

schema designperformancedatabase design

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Behavioral & Leadership3 questions · ~24 min

Resolving Production IssuesMedium

Tests ownership, prioritization, and judgment while resolving an ambiguous production issue under pressure.

behavior under pressurebug trackinglearning

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