2026

Python Interview Questions 2026

A current, 2026 snapshot of the Python interview questions worth knowing — kept up to date as frameworks and best practices evolve, so you prepare with what companies are actually asking in 2026.

100Questions14Beginner13Intermediate73Senior

100 Python questions

  1. 1__init__ vs __new__Intermediate
  2. 2Garbage CollectionIntermediate
  3. 3Global Interpreter Lock (GIL)Intermediate
  4. 4Context Managers (with)Intermediate
  5. 5Lambda FunctionsIntermediate
  6. 6Shallow vs Deep CopyIntermediate
  7. 7What’s the difference between list and dictionary comprehensions in Python?Intermediate
  8. 8Generators and YieldIntermediate
  9. 9DecoratorsIntermediate
  10. 10*args and **kwargsIntermediate
  11. 11Virtual EnvironmentsBeginner
  12. 12Python DocstringsBeginner
  13. 13Break vs ContinueBeginner
  14. 14Dictionary get() methodBeginner
  15. 15Error handling (try/except)Beginner
  16. 16PEP 8 standardBeginner
  17. 17Class 'self' keywordBeginner
  18. 18List ComprehensionsBeginner
  19. 19The 'is' vs '==' operatorsBeginner
  20. 20What is the difference between a list and a tuple in Python?Beginner
  21. 21Python Interview Question 2 (Free)Intermediate
  22. 22Python Interview Question 1 (Free)Beginner
  23. 23Python Interview Question 5 (Free)Intermediate
  24. 24Python Interview Question 4 (Free)Beginner
  25. 25Python Interview Question 3 (Free)Senior
  26. 26Python-based Workflow Engine DesignSenior
  27. 27Hallucination-Resistant Multi-Vector RAGSenior
  28. 28Architectural Rate LimitingSenior
  29. 29C++ Interop Lifecycle ManagementSenior
  30. 30Serverless Cold Start OptimizationSenior
  31. 31Custom Import Hooks (PEP 302)Senior
  32. 32Distributed Tracing and ObservabilitySenior
  33. 33Zero-Downtime Online MigrationsSenior
  34. 34Scalable ML Inference PipelinesSenior
  35. 35Transactional Outbox PatternSenior
  36. 36Security Architecture: Sandboxing ScriptsSenior
  37. 37High-Performance ASGI Gateway DesignSenior
  38. 38Distributed Locking with RedlockSenior
  39. 39Python Memory Layout and Data LocalitySenior
  40. 40Designing Event-Driven Microservices with KafkaSenior
  41. 41Implementing Circuit Breaker PatternsSenior
  42. 42Designing for Scalable WebSockets with Django ChannelsSenior
  43. 43Micro-kernel Architecture in Python FrameworksSenior
  44. 44The Evolution of Python's Memory Allocator (pymalloc)Senior
  45. 45Python and Hardware: Interfacing with CFFISenior
  46. 46Advanced Generic Programming with ProtocolSenior
  47. 47Designing Idempotent Task ConsumersSenior
  48. 48Secure Multi-Tenant Execution (Pyodide / WASM)Senior
  49. 49Architecture of Python Packaging: pyproject.tomlSenior
  50. 50Managing Global State in Concurrent ApplicationsSenior
  51. 51Building Observable Systems with OpenTelemetrySenior
  52. 52Python VM Optimizations: Specialized BytecodeSenior
  53. 53Implementing the Saga Pattern for MicroservicesSenior
  54. 54Designing for 'Fail-Fast' with Type GuardsSenior
  55. 55High-Performance Serialization: Apache Arrow and ParquetSenior
  56. 56The 'New' Unified Type System ArchitectureSenior
  57. 57Memory Leak Identification in Extension ModulesSenior
  58. 58Building a Custom Plugin System via Entry PointsSenior
  59. 59Asynchronous Context Managers and Task GroupsSenior
  60. 60Designing Hallucination-Resistant RAG WorkflowsSenior
  61. 61Python's Data Model: __getattr__ vs __getattribute__Senior
  62. 62Advanced Caching Strategies with functools.lru_cacheSenior
  63. 63Taming Circular Dependencies in Large-Scale ArchitecturesSenior
  64. 64Zero-Copy Memory Views for High-Throughput I/OSenior
  65. 65Global Interpreter Lock (GIL) Removal in PEP 703Senior
  66. 66Python Internals (sys.setrecursionlimit)Senior
  67. 67Pydantic for Data ValidationSenior
  68. 68Thread Safety (Locking)Senior
  69. 69Async GeneratorsSenior
  70. 70Design Patterns: SingletonSenior
  71. 71Weak References (weakref)Senior
  72. 72inspect moduleSenior
  73. 73Custom IteratorsSenior
  74. 74Structural Pattern Matching (3.10+)Senior
  75. 75Advanced Decorators (Class-based)Senior
  76. 76CFFI vs ctypesSenior
  77. 77Functional Programming (Partial)Senior
  78. 78Memory Leaks (tracemalloc)Senior
  79. 79Python and Docker OptimizationSenior
  80. 80Dependency Injection ArchitectureSenior
  81. 81Pickle & SecuritySenior
  82. 82Contextlib & GeneratorsSenior
  83. 83Metaprogramming (getattr/setattr)Senior
  84. 84Python Bytecode (dis module)Senior
  85. 85Multiprocessing vs ThreadingSenior
  86. 86Itertools & Lazy EvaluationSenior
  87. 87Profiling (cProfile)Senior
  88. 88Cython for PerformanceSenior
  89. 89Descriptor ProtocolSenior
  90. 90Function Annotations & MyPySenior
  91. 91MRO and C3 LinearizationSenior
  92. 92Abstract Base Classes (ABC)Senior
  93. 93Asyncio Event LoopSenior
  94. 94Slots (__slots__)Senior
  95. 95MetaclassesSenior
  96. 96Python Advanced Interview Question 10Beginner
  97. 97Python Advanced Interview Question 9Senior
  98. 98Python Advanced Interview Question 8Intermediate
  99. 99Python Advanced Interview Question 7Beginner
  100. 100Python Advanced Interview Question 6Senior

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Frequently asked questions

Are these Python interview questions up to date for 2026?

Yes. This page reflects 100 Python interview questions kept current with today's frameworks, tooling and interview trends, with each answer maintained and dated.

What Python topics should I focus on in 2026?

Prioritise the fundamentals plus the modern patterns interviewers ask about now. Each question here includes a detailed answer, code example and common mistakes so you can target the highest-impact areas.

Are these questions free?

You can read the question and a short answer for free. A subscription unlocks the full detailed explanation, real-world example, common mistakes and follow-up questions for each one.