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Question-1. What is a service mesh?
Answer-1: A service mesh is an infrastructure layer that manages service-to-service communication in a microservices architecture.
Question-2. Name two popular service mesh tools.
Answer-2: Istio and Linkerd.
Question-3. What is the main benefit of using a service mesh?
Answer-3: It provides fine-grained control over traffic with security, observability, and reliability.
Question-4. How does a service mesh improve security?
Answer-4: It enables mutual TLS encryption between services automatically.
Question-5. What role does observability play in service meshes?
Answer-5: Service meshes offer built-in telemetry, metrics, and tracing for monitoring service health and traffic.
Question-6. How does a service mesh handle retries and failovers?
Answer-6: It provides configurable retry, timeout, and circuit breaker mechanisms without changing application code.
Question-7. Does a service mesh reduce development effort?
Answer-7: Yes, it abstracts networking and security concerns away from the application code.
Question-8. Can a service mesh simplify A/B testing?
Answer-8: Yes, it supports traffic splitting and routing for A/B or canary deployments.
Question-9. How does a service mesh enable traffic control?
Answer-9: It allows routing rules, rate limiting, and fault injection through configuration.
Question-10. What?s the benefit of policy enforcement in service meshes?
Answer-10: It enables security and compliance policies to be centrally managed and enforced.
Question-11. Can a service mesh improve application performance?
Answer-11: Yes, through intelligent traffic routing and performance metrics monitoring.
Question-12. Is a service mesh language-agnostic?
Answer-12: Yes, it works at the network level and is independent of application language.
Question-13. How does a service mesh help with compliance?
Answer-13: It provides auditable logs and enforces secure communication standards like mTLS.
Question-14. What is mutual TLS (mTLS) in service mesh?
Answer-14: It ensures encrypted and authenticated communication between services.
Question-15. What observability features are common in service meshes?
Answer-15: Metrics, distributed tracing, and logging.
Question-16. How does a service mesh support zero-trust security models?
Answer-16: By enforcing identity-based access and secure connections between services.
Question-17. What is fault injection in service mesh?
Answer-17: It's a feature that simulates failures to test service resilience.
Question-18. Can you enforce rate limits using a service mesh?
Answer-18: Yes, rate limiting can be configured per service.
Question-19. Does a service mesh allow versioned deployments?
Answer-19: Yes, it can route traffic between multiple versions of a service.
Question-20. How does a service mesh improve operational agility?
Answer-20: By enabling dynamic traffic routing and policy updates without redeploying services.
Question-21. How is load balancing handled in a service mesh?
Answer-21: Automatically through built-in service discovery and routing algorithms.
Question-22. What type of telemetry does service mesh provide?
Answer-22: Latency, error rates, traffic volume, and trace data.
Question-23. Can service mesh simplify blue/green deployments?
Answer-23: Yes, it manages traffic between blue and green versions with minimal config changes.
Question-24. What?s the benefit of service discovery in service mesh?
Answer-24: It automates endpoint resolution and updates, reducing manual overhead.
Question-25. How does a service mesh aid DevOps?
Answer-25: It offloads networking and security configurations from app teams to DevOps.
Question-26. What is sidecar proxy in service mesh?
Answer-26: A lightweight network proxy deployed alongside each service instance to manage traffic.
Question-27. What?s the benefit of decentralized control in a service mesh?
Answer-27: Each service can have its own policies and configuration.
Question-28. How does a service mesh impact CI/CD?
Answer-28: It integrates easily to enable safer deployments through routing control and metrics.
Question-29. Can a service mesh detect service health issues?
Answer-29: Yes, through telemetry data and configurable health checks.
Question-30. How is traffic shifting used in service meshes?
Answer-30: To gradually route traffic to new service versions or away from failing ones.
Question-31. What logging benefits come with a service mesh?
Answer-31: Centralized logs of traffic, failures, and policy violations.
Question-32. Can a service mesh prevent DDoS at service level?
Answer-32: It can apply rate limiting and circuit breaking to protect services.
Question-33. What role does a control plane play in service mesh?
Answer-33: It manages configuration and policy distribution across proxies.
Question-34. How does a data plane function in service mesh?
Answer-34: It handles actual network traffic between services.
Question-35. How can service mesh help in multi-cluster setups?
Answer-35: It supports cross-cluster service discovery and secure communication.
Question-36. Is network visibility improved with service mesh?
Answer-36: Yes, it provides detailed visibility into service communication patterns.
Question-37. Can you define custom routing rules in service mesh?
Answer-37: Yes, for headers, paths, or weights.
Question-38. What?s the advantage of decoupling security from code?
Answer-38: It allows security features to evolve independently of the application.
Question-39. What?s the benefit of consistent traffic control?
Answer-39: It reduces errors and allows faster problem resolution.
Question-40. Does service mesh reduce time to recovery?
Answer-40: Yes, due to automated failovers and retry policies.
Question-41. Can service mesh operate in Kubernetes?
Answer-41: Yes, it is often used in Kubernetes environments.
Question-42. What is the benefit of gradual rollouts in service mesh?
Answer-42: It reduces risk by limiting exposure during new deployments.
Question-43. Can service mesh be used with legacy apps?
Answer-43: Yes, as long as the app can run with a sidecar proxy.
Question-44. Does service mesh reduce troubleshooting time?
Answer-44: Yes, due to detailed telemetry and centralized logs.
Question-45. How does service mesh assist in security audits?
Answer-45: It maintains encrypted logs and traffic data for audit trails.
Question-46. What is service identity in a mesh?
Answer-46: A unique identity assigned to each service to support access policies.
Question-47. How does it improve developer productivity?
Answer-47: Developers can focus on business logic, not infrastructure concerns.
Question-48. Can service mesh enforce API access control?
Answer-48: Yes, based on service identity and policy rules.
Question-49. What?s the benefit of mesh federation?
Answer-49: It enables secure communication between multiple service meshes or clusters.
Question-50. Can service mesh reduce total cost of ownership (TCO)?
Answer-50: Yes, by reducing manual operations, errors, and improving system resilience.
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