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Why is eventual consistency preferred over strong consistency in large-scale microservices systems?

hard📝 Conceptual Q10 of 15
Microservices - Event-Driven Architecture
Why is eventual consistency preferred over strong consistency in large-scale microservices systems?
ABecause it forces all services to use the same database
BBecause it guarantees all data is always identical instantly
CBecause it removes the need for any data synchronization
DBecause it improves system availability and scalability by allowing temporary data differences
Step-by-Step Solution
Solution:
  1. Step 1: Understand trade-offs between consistency models

    Strong consistency requires all data to be identical instantly, which can reduce availability and scalability.
  2. Step 2: Identify benefits of eventual consistency

    Eventual consistency allows temporary differences, improving availability and scalability in distributed systems.
  3. Final Answer:

    Because it improves system availability and scalability by allowing temporary data differences -> Option D
  4. Quick Check:

    Eventual consistency boosts availability and scalability [OK]
Quick Trick: Eventual consistency favors availability over instant sync [OK]
Common Mistakes:
MISTAKES
  • Confusing eventual with strong consistency
  • Thinking no synchronization is needed
  • Assuming single database solves consistency

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