Interview Prep

Mid-level

• What is the GIL in CPython and when does it limit performance?
  Concepts Frequent Python GIL concurrency
• Implement a memoization decorator in Python
  Coding Frequent Python decorators memoization
• What are context managers in Python and how do you implement one with __enter__ and __exit__?
  Concepts Very frequent Python context manager __enter__
• Implement a retry decorator with configurable attempts and exponential backoff
  Coding Frequent Python decorator retry
• Tell me about a time you optimised a slow Python service in production
  Behavioural Very frequent Python performance profiling
• Design a Python service for processing real-time user activity events with rate limiting
  SystemDesign Frequent Python system design Kafka