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Microservices Interview Questions

Architecture patterns, API Gateway, service discovery, Circuit Breaker, Saga, distributed tracing, and event-driven design.

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0 / 100 answered
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2 Easy59 Medium39 Hard

Showing 1–20 of 100

#1What are microservices and what problems do they solve?

Easy
Architecture

#2What is an API Gateway and what does it do?

Medium
Architecture

#3How do microservices communicate?

Medium
Communication

#4What is service discovery in microservices?

Medium
Infrastructure

#5What is the Circuit Breaker pattern and how does it prevent cascading failures?

Medium
Resilience

#6What is distributed tracing and why is it important?

Medium
Observability

#7What is the Strangler Fig pattern for microservices migration?

Medium
Architecture

#8What is a sidecar pattern?

Hard
Infrastructure

#9How do you manage configuration in microservices?

Medium
Infrastructure

#10What are the 12-Factor App principles?

Medium
Architecture

#11What is event-driven architecture and when should you use it?

Medium
Architecture

#12What is the difference between orchestration and choreography in Saga?

Hard
Distributed Transactions

#13How do you test microservices effectively?

Medium
Testing

#14What is a service mesh and when should you use one?

Hard
Infrastructure

#15How do you ensure data consistency across microservices?

Hard
Distributed Transactions

#16What is the circuit breaker pattern?

Medium
Resilience

#17What is service discovery and how does it work?

Medium
Infrastructure

#18What is the Bulkhead pattern?

Medium
Resilience

#19What is the Retry pattern and how do you implement it safely?

Medium
Resilience

#20What is the difference between choreography and orchestration in Sagas?

Hard
Distributed Transactions

Showing 1–20 of 100

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All 100 Microservices questions at a glance
  1. What are microservices and what problems do they solve?(Easy)
  2. What is an API Gateway and what does it do?(Medium)
  3. How do microservices communicate?(Medium)
  4. What is service discovery in microservices?(Medium)
  5. What is the Circuit Breaker pattern and how does it prevent cascading failures?(Medium)
  6. What is distributed tracing and why is it important?(Medium)
  7. What is the Strangler Fig pattern for microservices migration?(Medium)
  8. What is a sidecar pattern?(Hard)
  9. How do you manage configuration in microservices?(Medium)
  10. What are the 12-Factor App principles?(Medium)
  11. What is event-driven architecture and when should you use it?(Medium)
  12. What is the difference between orchestration and choreography in Saga?(Hard)
  13. How do you test microservices effectively?(Medium)
  14. What is a service mesh and when should you use one?(Hard)
  15. How do you ensure data consistency across microservices?(Hard)
  16. What is the circuit breaker pattern?(Medium)
  17. What is service discovery and how does it work?(Medium)
  18. What is the Bulkhead pattern?(Medium)
  19. What is the Retry pattern and how do you implement it safely?(Medium)
  20. What is the difference between choreography and orchestration in Sagas?(Hard)
  21. What is the Backend for Frontend (BFF) pattern?(Medium)
  22. How do you implement distributed tracing?(Medium)
  23. What is the Strangler Fig pattern for migrating a monolith?(Medium)
  24. What is eventual consistency and how do you design for it?(Hard)
  25. How do you version microservice APIs?(Medium)
  26. What is the Sidecar pattern?(Medium)
  27. What is a dead letter queue and why is it important?(Medium)
  28. How do you implement health checks in microservices?(Medium)
  29. What is the Outbox pattern and how does it guarantee event delivery?(Hard)
  30. What is idempotency and how do you implement it in microservices?(Hard)
  31. What are the 12-Factor App principles?(Medium)
  32. How do you handle secrets management in microservices?(Hard)
  33. What is the Ambassador pattern in microservices?(Medium)
  34. How do you implement inter-service authentication?(Hard)
  35. What is the Throttling pattern and how does it differ from rate limiting?(Medium)
  36. What is CQRS and how does it apply to microservices?(Hard)
  37. How do you test microservices?(Medium)
  38. What is service isolation and why is it important?(Medium)
  39. What is an Event-Driven Architecture?(Medium)
  40. How do you handle database per service in practice?(Hard)
  41. What is the Role of API composition in microservices?(Medium)
  42. What is graceful degradation in microservices?(Medium)
  43. What is the Event Sourcing pattern?(Hard)
  44. How do you implement logging in a microservices environment?(Medium)
  45. What is the two-phase commit vs Saga for distributed transactions?(Hard)
  46. How do you handle timeouts in microservices?(Medium)
  47. What is the Scatter-Gather pattern?(Medium)
  48. What is the difference between a microservice and a nanoservice?(Medium)
  49. How do you implement canary deployments in microservices?(Medium)
  50. What is a Service Registry?(Medium)
  51. What is blue-green deployment and how does it work?(Medium)
  52. What is the Aggregator pattern?(Medium)
  53. How do microservices handle configuration management?(Medium)
  54. What is the Proxy pattern in microservices?(Medium)
  55. How do you implement distributed locking in microservices?(Hard)
  56. What is Kafka and why is it popular in microservices?(Medium)
  57. How do you manage service dependencies in microservices?(Hard)
  58. What is a bounded context?(Hard)
  59. How do you implement a request-reply pattern over async messaging?(Hard)
  60. What is the Token Bucket algorithm and how is it used for rate limiting?(Hard)
  61. How do you handle schema evolution in event-driven systems?(Hard)
  62. What is the difference between a monolith, microservices, and modular monolith?(Medium)
  63. What is the Choreography pattern in detail?(Hard)
  64. What is a composite microservice?(Medium)
  65. How do you deal with "chatty" microservices?(Medium)
  66. What is a process manager / workflow engine in microservices?(Hard)
  67. How do you implement zero-downtime deployments for microservices?(Hard)
  68. What is the Anti-Corruption Layer pattern?(Medium)
  69. What are the common pitfalls of microservices adoption?(Medium)
  70. What is the difference between orchestration and choreography?(Medium)
  71. How do you implement a consistent read across microservices?(Hard)
  72. What is load shedding?(Medium)
  73. What is the difference between gRPC and REST for inter-service communication?(Medium)
  74. What is the Gateway Aggregation pattern vs Gateway Routing?(Medium)
  75. What is the Inbox pattern?(Hard)
  76. How do you handle versioning of events in Kafka?(Hard)
  77. What is the Open Host Service pattern?(Medium)
  78. How do you implement service-level SLOs in microservices?(Medium)
  79. What is the Claim Check pattern?(Medium)
  80. What is service mesh traffic management?(Hard)
  81. What is the difference between horizontal and vertical scaling for microservices?(Medium)
  82. What is the role of a message schema registry?(Medium)
  83. How do you handle service discovery with Kubernetes?(Medium)
  84. What is the Publisher-Subscriber (Pub-Sub) pattern?(Easy)
  85. How do you implement an API gateway from scratch?(Hard)
  86. What is consumer-driven contract testing (Pact)?(Hard)
  87. How do you use feature toggles in microservices?(Medium)
  88. What is polyglot persistence in microservices?(Medium)
  89. What are distributed caching strategies for microservices?(Hard)
  90. How do you design a CI/CD pipeline for microservices?(Hard)
  91. How do you implement observability with Micrometer, Prometheus, and Grafana?(Hard)
  92. What is the Retry pattern and when should you NOT retry?(Medium)
  93. How do you implement Saga compensation (rollback) in detail?(Hard)
  94. What is multi-tenancy in microservices and how do you implement it?(Hard)
  95. What are the steps to migrate a monolith to microservices using the Strangler Fig pattern?(Hard)
  96. How do you design microservices for failure?(Hard)
  97. What is data mesh and how does it relate to microservices data ownership?(Hard)
  98. What is a sidecar proxy and how does Envoy work?(Hard)
  99. How do you handle inter-service authorization (not just authentication)?(Hard)
  100. When should you NOT use microservices?(Medium)