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Deep Dive on Messaging and Frameworks
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Deep Dive on Messaging and Frameworks

HardPython

Problem

Q: How kafka works? Q: How spring work? What's IoC? What's the difference between @Bean and @Component? Q: How mongodb indexing works? what's CDC?

For the coding portion, model the Spring IoC part as a dependency graph. Given component definitions and requested root components, return a deterministic initialization order in which every dependency appears before the component that requires it. Return an empty list if a dependency is missing or the reachable graph contains a cycle.

Input and Output

components maps component names to dependency-name arrays. requested is an array of root component names. Return a list of names or [].

Constraints

  • 1 <= len(components) <= 10000
  • 0 <= len(requested) <= len(components)
  • Each component name is a unique non-empty string
  • Each dependency list contains component names, possibly including duplicates
  • The total number of dependency references is at most 50000
  • Initialization order must be deterministic

Function Signature

def resolve_ioc_order(components, requested):
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